{"title":"Minus Green Filters","description":"\u003cp\u003eReduce selected green-region light to adjust the color balance of a source. Compare the depth and width of the reduction with the source spectrum.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Confirm the desired tint correction and acceptable light loss using the combined source-and-filter spectrum. Correction strength is source dependent.\u003c\/p\u003e","products":[{"product_id":"tm-30","title":"TM-30 Minus-green correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/minus-green-filters\"\u003eMinus Green Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eMinus-green correction filter (TM-30)\u003c\/h2\u003e\n\u003cp\u003eTM-30 is a minus-green correction filter. It attenuates part of the green-to-yellow region relative to surrounding wavelengths. This can help reduce a green cast in lighting. Average transmission in the sample is 90.2% over 400-500 nm, 66.7% over 500-600 nm, 91% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 90.2% average transmission; the range is 58.5-94.4% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 66.7% average transmission; the range is 39.1-94.2% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 91% average transmission; the range is 61.9-95.7% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 70% transmission:\u003c\/strong\u003e Approximately 544.4 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixed-source film and studio lighting:\u003c\/strong\u003e Try it when matching fixtures that have different amounts of green in their light. Choose strength by measuring the resulting tint.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhotography and camera matching:\u003c\/strong\u003e Consider spectral tint adjustment at the light source before camera profiling. Confirm the effect on the colors important to the shoot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLuminaire color tuning:\u003c\/strong\u003e Compare minus-green filters with your actual light source, and check how much light each one removes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/TM-30.html\" title=\"TM-30 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about TM-30\u003c\/h2\u003e\n\u003ch3\u003eDoes TM-30 affect blue and red as well as green?\u003c\/h3\u003e\n\u003cp\u003eCompare the sample averages: 90.2% over 400-500 nm; 66.7% over 500-600 nm; 91% over 600-700 nm. Those bands help you judge both the correction and the light you retain, but a narrow green emission line should be checked at its actual wavelength on the curve.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 70% crossing near 544.4 nm mean for TM-30?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 70% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For TM-30, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Minus Green Filter \/ Full Minus Green","offer_id":48516668063999,"sku":"TM-30","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/tm-30-spectrum.jpg?v=1778712878"},{"product_id":"tmg-3308","title":"TMG-3308 Minus-green correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/minus-green-filters\"\u003eMinus Green Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eMinus-green correction filter (TMG-3308)\u003c\/h2\u003e\n\u003cp\u003eTMG-3308 is a minus-green correction filter. It attenuates part of the green-to-yellow region relative to surrounding wavelengths. This can help reduce a green cast in lighting. Average transmission in the sample is 65.2% over 400-500 nm, 48% over 500-600 nm, 83.5% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 65.2% average transmission; the range is 52.1-71.2% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 48% average transmission; the range is 41.2-67.6% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 83.5% average transmission; the range is 67.6-91.2% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 506.7 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixed-source film and studio lighting:\u003c\/strong\u003e Try it when matching fixtures that have different amounts of green in their light. Choose strength by measuring the resulting tint.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhotography and camera matching:\u003c\/strong\u003e Consider spectral tint adjustment at the light source before camera profiling. Confirm the effect on the colors important to the shoot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLuminaire color tuning:\u003c\/strong\u003e Compare minus-green filters with your actual light source, and check how much light each one removes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/TMG-3308.html\" title=\"TMG-3308 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about TMG-3308\u003c\/h2\u003e\n\u003ch3\u003eHow can I judge the strength of TMG-3308?\u003c\/h3\u003e\n\u003cp\u003eCompare the sample averages: 65.2% over 400-500 nm; 48% over 500-600 nm; 83.5% over 600-700 nm. Those bands help you judge both the correction and the light you retain, but a narrow green emission line should be checked at its actual wavelength on the curve.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 506.7 nm mean for TMG-3308?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For TMG-3308, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Minus Green Filter \/ 3\/4 Minus Green","offer_id":48516668096767,"sku":"TMG-3308","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/tmg-3308-spectrum.jpg?v=1778712879"},{"product_id":"emg","title":"EMG Minus-green correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/minus-green-filters\"\u003eMinus Green Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eMinus-green correction filter (EMG)\u003c\/h2\u003e\n\u003cp\u003eEMG is a minus-green correction filter. It attenuates part of the green-to-yellow region relative to surrounding wavelengths. This can help reduce a green cast in lighting. Average transmission in the sample is 83.5% over 400-500 nm, 82.9% over 500-600 nm, 91% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 83.5% average transmission; the range is 61.8-89% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 82.9% average transmission; the range is 76.6-89.1% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 91% average transmission; the range is 86.9-94% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 80% transmission:\u003c\/strong\u003e Approximately 544.7 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixed-source film and studio lighting:\u003c\/strong\u003e Try it when matching fixtures that have different amounts of green in their light. Choose strength by measuring the resulting tint.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhotography and camera matching:\u003c\/strong\u003e Consider spectral tint adjustment at the light source before camera profiling. Confirm the effect on the colors important to the shoot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLuminaire color tuning:\u003c\/strong\u003e Compare minus-green filters with your actual light source, and check how much light each one removes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/EMG.html\" title=\"EMG transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about EMG\u003c\/h2\u003e\n\u003ch3\u003eHow selective is EMG across the visible spectrum?\u003c\/h3\u003e\n\u003cp\u003eCompare the sample averages: 83.5% over 400-500 nm; 82.9% over 500-600 nm; 91% over 600-700 nm. Those bands help you judge both the correction and the light you retain, but a narrow green emission line should be checked at its actual wavelength on the curve.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 80% crossing near 544.7 nm mean for EMG?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 80% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For EMG, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Minus Green Filter \/ 1\/8 Minus Green","offer_id":48516668129535,"sku":"EMG","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/emg-spectrum.jpg?v=1778712880"},{"product_id":"qmg","title":"QMG Minus-green correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/minus-green-filters\"\u003eMinus Green Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eMinus-green correction filter (QMG)\u003c\/h2\u003e\n\u003cp\u003eQMG is a minus-green correction filter. It attenuates part of the green-to-yellow region relative to surrounding wavelengths. This can help reduce a green cast in lighting. Average transmission in the sample is 85.1% over 400-500 nm, 77.6% over 500-600 nm, 90.4% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 85.1% average transmission; the range is 81.2-88.7% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 77.6% average transmission; the range is 72.5-88.4% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 90.4% average transmission; the range is 88.4-92.6% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 80% transmission:\u003c\/strong\u003e Approximately 505.5 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixed-source film and studio lighting:\u003c\/strong\u003e Try it when matching fixtures that have different amounts of green in their light. Choose strength by measuring the resulting tint.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhotography and camera matching:\u003c\/strong\u003e Consider spectral tint adjustment at the light source before camera profiling. Confirm the effect on the colors important to the shoot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLuminaire color tuning:\u003c\/strong\u003e Compare minus-green filters with your actual light source, and check how much light each one removes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/QMG.html\" title=\"QMG transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about QMG\u003c\/h2\u003e\n\u003ch3\u003eHow selective is QMG across the visible spectrum?\u003c\/h3\u003e\n\u003cp\u003eCompare the sample averages: 85.1% over 400-500 nm; 77.6% over 500-600 nm; 90.4% over 600-700 nm. Those bands help you judge both the correction and the light you retain, but a narrow green emission line should be checked at its actual wavelength on the curve.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 80% crossing near 505.5 nm mean for QMG?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 80% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For QMG, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Minus Green Filter \/ 1\/4 Minus Green","offer_id":48516668162303,"sku":"QMG","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/qmg-spectrum.jpg?v=1778712881"},{"product_id":"hmg-7","title":"HMG-7 Minus-green correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/minus-green-filters\"\u003eMinus Green Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eMinus-green correction filter (HMG-7)\u003c\/h2\u003e\n\u003cp\u003eHMG-7 is a minus-green correction filter. It attenuates part of the green-to-yellow region relative to surrounding wavelengths. This can help reduce a green cast in lighting. Average transmission in the sample is 80.5% over 400-500 nm, 79.1% over 500-600 nm, 91.9% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 80.5% average transmission; the range is 75.2-88.5% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 79.1% average transmission; the range is 69-89.1% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 91.9% average transmission; the range is 73.5-96.1% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 85% transmission:\u003c\/strong\u003e Approximately 528.6 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixed-source film and studio lighting:\u003c\/strong\u003e Try it when matching fixtures that have different amounts of green in their light. Choose strength by measuring the resulting tint.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhotography and camera matching:\u003c\/strong\u003e Consider spectral tint adjustment at the light source before camera profiling. Confirm the effect on the colors important to the shoot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLuminaire color tuning:\u003c\/strong\u003e Compare minus-green filters with your actual light source, and check how much light each one removes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/HMG-7.html\" title=\"HMG-7 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about HMG-7\u003c\/h2\u003e\n\u003ch3\u003eHow can I judge the strength of HMG-7?\u003c\/h3\u003e\n\u003cp\u003eCompare the sample averages: 80.5% over 400-500 nm; 79.1% over 500-600 nm; 91.9% over 600-700 nm. Those bands help you judge both the correction and the light you retain, but a narrow green emission line should be checked at its actual wavelength on the curve.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 85% crossing near 528.6 nm mean for HMG-7?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 85% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For HMG-7, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Minus Green Filter \/ 1\/2 Minus Green","offer_id":48516668195071,"sku":"HMG-7","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/hmg-7-spectrum.jpg?v=1778712882"},{"product_id":"hmg-6","title":"HMG-6 Minus-green correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/minus-green-filters\"\u003eMinus Green Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eMinus-green correction filter (HMG-6)\u003c\/h2\u003e\n\u003cp\u003eHMG-6 is a minus-green correction filter. It attenuates part of the green-to-yellow region relative to surrounding wavelengths. This can help reduce a green cast in lighting. Average transmission in the sample is 83.6% over 400-500 nm, 72.6% over 500-600 nm, 93.7% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 83.6% average transmission; the range is 60.9-95.1% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 72.6% average transmission; the range is 44.9-94.9% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 93.7% average transmission; the range is 92-95.3% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 70% transmission:\u003c\/strong\u003e Approximately 532.4 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 70% transmission:\u003c\/strong\u003e Approximately 577.6 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixed-source film and studio lighting:\u003c\/strong\u003e Try it when matching fixtures that have different amounts of green in their light. Choose strength by measuring the resulting tint.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhotography and camera matching:\u003c\/strong\u003e Consider spectral tint adjustment at the light source before camera profiling. Confirm the effect on the colors important to the shoot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLuminaire color tuning:\u003c\/strong\u003e Compare minus-green filters with your actual light source, and check how much light each one removes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/HMG-6.html\" title=\"HMG-6 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about HMG-6\u003c\/h2\u003e\n\u003ch3\u003eDoes HMG-6 affect blue and red as well as green?\u003c\/h3\u003e\n\u003cp\u003eCompare the sample averages: 83.6% over 400-500 nm; 72.6% over 500-600 nm; 93.7% over 600-700 nm. Those bands help you judge both the correction and the light you retain, but a narrow green emission line should be checked at its actual wavelength on the curve.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 70% crossing near 577.6 nm mean for HMG-6?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 70% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For HMG-6, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Minus Green Filter \/ 3\/4 Minus Green","offer_id":48516668227839,"sku":"HMG-6","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/hmg-6-spectrum.jpg?v=1778712882"},{"product_id":"hmg-5","title":"HMG-5 Minus-green correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/minus-green-filters\"\u003eMinus Green Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eMinus-green correction filter (HMG-5)\u003c\/h2\u003e\n\u003cp\u003eHMG-5 is a minus-green correction filter. It attenuates part of the green-to-yellow region relative to surrounding wavelengths. This can help reduce a green cast in lighting. Average transmission in the sample is 92.7% over 400-500 nm, 83.7% over 500-600 nm, 95.1% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 92.7% average transmission; the range is 83.8-94.8% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 83.7% average transmission; the range is 77.2-94.1% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 95.1% average transmission; the range is 92.5-95.8% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 85% transmission:\u003c\/strong\u003e Approximately 521.6 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixed-source film and studio lighting:\u003c\/strong\u003e Try it when matching fixtures that have different amounts of green in their light. Choose strength by measuring the resulting tint.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhotography and camera matching:\u003c\/strong\u003e Consider spectral tint adjustment at the light source before camera profiling. Confirm the effect on the colors important to the shoot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLuminaire color tuning:\u003c\/strong\u003e Compare minus-green filters with your actual light source, and check how much light each one removes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/HMG-5.html\" title=\"HMG-5 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about HMG-5\u003c\/h2\u003e\n\u003ch3\u003eHow selective is HMG-5 across the visible spectrum?\u003c\/h3\u003e\n\u003cp\u003eCompare the sample averages: 92.7% over 400-500 nm; 83.7% over 500-600 nm; 95.1% over 600-700 nm. Those bands help you judge both the correction and the light you retain, but a narrow green emission line should be checked at its actual wavelength on the curve.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 85% crossing near 521.6 nm mean for HMG-5?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 85% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For HMG-5, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Minus Green Filter \/ 1\/4 Minus Green","offer_id":48516668260607,"sku":"HMG-5","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/hmg-5-spectrum.jpg?v=1778712883"},{"product_id":"hmg-4","title":"HMG-4 Minus-green correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/minus-green-filters\"\u003eMinus Green Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eMinus-green correction filter (HMG-4)\u003c\/h2\u003e\n\u003cp\u003eHMG-4 is a minus-green correction filter. It attenuates part of the green-to-yellow region relative to surrounding wavelengths. This can help reduce a green cast in lighting. Average transmission in the sample is 71.6% over 400-500 nm, 66.3% over 500-600 nm, 85% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 71.6% average transmission; the range is 64.8-77.2% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 66.3% average transmission; the range is 62.7-74.1% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 85% average transmission; the range is 74.1-90.5% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 70% transmission:\u003c\/strong\u003e Approximately 504.7 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 70% transmission:\u003c\/strong\u003e Approximately 588.4 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixed-source film and studio lighting:\u003c\/strong\u003e Try it when matching fixtures that have different amounts of green in their light. Choose strength by measuring the resulting tint.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhotography and camera matching:\u003c\/strong\u003e Consider spectral tint adjustment at the light source before camera profiling. Confirm the effect on the colors important to the shoot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLuminaire color tuning:\u003c\/strong\u003e Compare minus-green filters with your actual light source, and check how much light each one removes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/HMG-4.html\" title=\"HMG-4 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about HMG-4\u003c\/h2\u003e\n\u003ch3\u003eHow can I judge the strength of HMG-4?\u003c\/h3\u003e\n\u003cp\u003eCompare the sample averages: 71.6% over 400-500 nm; 66.3% over 500-600 nm; 85% over 600-700 nm. Those bands help you judge both the correction and the light you retain, but a narrow green emission line should be checked at its actual wavelength on the curve.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 70% crossing near 588.4 nm mean for HMG-4?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 70% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For HMG-4, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Minus Green Filter \/ 1\/4 Minus Green","offer_id":48516668293375,"sku":"HMG-4","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/hmg-4-spectrum.jpg?v=1778712884"}],"url":"https:\/\/kupooptics.com\/collections\/minus-green-filters.oembed","provider":"KUPO Optics","version":"1.0","type":"link"}