{"title":"HT100III  Astrophotography Filters","description":"","products":[{"product_id":"lprf-100x100mm","title":"KANI Light Pollution Reduction Filter (100x100mm)","description":"\u003cp\u003e\u003cb\u003eKANI Light Pollution Reduction Filter (100mm x 100mm) \u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e  SKU Number :  K04002\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePRODUCT DESCRIPTION \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e- The filter is Light Pollution Reduction Filter (LPRF) .\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e- The filter is 100mm x 100mm Square type dimension. (to use with 100mm holder  system)\u003c\/p\u003e\n\u003cp\u003e- The filter glass is made by B270 glass of German SCOTT\u003c\/p\u003e\n\u003cp\u003e- The filter both sides are ultra-precisely polished to maintain a high filter flatness accuracy.\u003c\/p\u003e\n\u003cp\u003e- The filter is water-proof, oil-proof and dust-proof with Premium Coating System.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThis is a light pollution reduction filter that can cuts and reduces for color casts caused by light pollution when photographing at the night times.\u003c\/p\u003e\n\u003cp\u003eThis is very useful to reduce the influence of unnecessary light sources such as urban lighting, sodium lamps, and mercury lamps.\u003c\/p\u003e\n\u003cp\u003eKANI's Light Pollution Reduction Filter is characterized by a good reducing rate of yellow.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWHY KANI \u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eKANI’s LPRF was collaboration product with the request of astrophotographer Mr. Akio Nakanishi, who is really famous\u003cspan class=\"Apple-converted-space\"\u003e  \u003c\/span\u003eastro-photographer in Japan.\u003cbr\u003eKANI's LPRF is the world's highest level as a light-pollution reduction filter for every photographer. KANI's LPRF is characterized by a very good yellowish cutoff ratio. The cutoff ratio, especially in the yellow area, is extremely excellent.\u003c\/p\u003e\n\u003cp\u003eKANI filters feature high transmittance due to B270 glass made by German company Scott, flatness accuracy due to double-sided ultra-precision polishing, low occurrence of ghosts and flares due to excellent coating technology, and high oil, water, and dust resistance. It is a gem that also has strength that is hard to damage and crack.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eThe Sky is amazing without Pollution of Light \u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eDid you ever notice how much beautiful the sky is without the star ? The sky without the pollution is one the greatest view. But in these day, mostly over urban areas, due to the electric lights of cars, street-lamps, offices, factories, outdoor advertising, and buildings, turning\u003cspan class=\"Apple-converted-space\"\u003e  \u003c\/span\u003ethe night are becoming the light pollution and people are very difficult to find the beauty of Night. \u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eLight pollution is an obstacle for your qualities of images\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe light wave from artificial light impact the photo quality badly. Specifically, the night pollution is like the enemies for the people of astrophotography. \u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKANI Light Pollution Reduction Filter will be one of the best way to solve this problem for photographing at night.\u003c\/b\u003e\u003c\/p\u003e","brand":"KANI","offers":[{"title":"Default Title","offer_id":53898102735214,"sku":"K04002","price":177.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0986\/0238\/5774\/files\/K04002_02.jpg?v=1781229703"},{"product_id":"partial-soft-focus-filter-100-150mm","title":"KANI Partial Soft Focus Filter ( 100x150mm )","description":"\u003cp\u003e\u003cb\u003eKANI Partial Soft Focus Filter (100x150mm)\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e  SKU Number :  K03012\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePRODUCT DESCRIPTION \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e- The filter is \u003cmeta charset=\"UTF-8\"\u003e\u003cb data-mce-fragment=\"1\"\u003ePartial Soft Focus Filter.\u003c\/b\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e- The filter is 100mm x 150mm rectangular dimension. (to use with 100mm holder system)\u003c\/p\u003e\n\u003cp\u003e- The filter glass is made by B270 glass of German SCOTT\u003c\/p\u003e\n\u003cp\u003e- The filter both sides are ultra-precisely polished to maintain a high filter flatness accuracy.\u003c\/p\u003e\n\u003cp\u003e- The filter is water-proof, oil-proof and dust-proof with Premium Coating System.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003cbr\u003eThis 100mm wide soft filter has a soft effect on 70% of the sky and the remaining 30% is clear.\u003c\/p\u003e\n\u003cp\u003eEspecially for starscape photography, the ground side of the image can be sharply defined while the stars are well emphasized.\u003c\/p\u003e\n\u003cp\u003eThis soft-effect filter is ideal for photographs with lighthouses, models, or night scenes on the ground side.\u003c\/p\u003e\n\u003cp\u003eThe filter is not labeled with the product name, as it can be used for full soft effect by shifting it to the edge. The product photo is an image and is not grayed out.\u003c\/p\u003e","brand":"KANI","offers":[{"title":"Default Title","offer_id":53898116497774,"sku":"K03012","price":187.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0986\/0238\/5774\/files\/K03012_01.jpg?v=1781230250"},{"product_id":"r-640-100x100mm","title":"KANI R640 Nebula Photography Filter 100x100mm","description":"\u003cdiv style=\"font-family:Arial,sans-serif; line-height:1.9; color:#222;\"\u003e\n\n\u003ch2 style=\"font-size:32px; margin-bottom:15px;\"\u003e\nKANI R640 Nebula Photography Filter 100x100mm\n\u003c\/h2\u003e\n\n\u003cp\u003e\nThe KANI R640 100x100mm Nebula Photography Filter is a specialized square filter designed for astrophotography and deep-sky imaging.\nDeveloped specifically for nebula photography, this filter enhances contrast in emission nebulae while helping reduce the influence of artificial light pollution.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThis filter was created under the supervision of astrophotographer \u003cstrong\u003eAkio Nakanishi\u003c\/strong\u003e following strong requests from astrophotography enthusiasts.\nAlthough similar filters from major manufacturers were discontinued due to limited commercial demand, the R640 filter remains highly valued among serious astrophotographers who require specialized nebula imaging tools.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThe R640 filter is designed to improve visibility of H-alpha emission regions and help photographers capture cleaner and more dramatic nebula images under various night sky conditions.\n\u003c\/p\u003e\n\n\u003cdiv style=\"background:#f5f5f5; padding:22px; border-radius:12px; margin:35px 0;\"\u003e\n\n\u003ch3 style=\"font-size:26px; margin-top:0;\"\u003e\nKey Features\n\u003c\/h3\u003e\n\n\u003cul style=\"padding-left:22px; margin-bottom:0;\"\u003e\n\n\u003cli\u003eSpecialized square filter designed for nebula photography\u003c\/li\u003e\n\n\u003cli\u003e100x100mm square filter format\u003c\/li\u003e\n\n\u003cli\u003eEnhances nebula contrast and H-alpha emission visibility\u003c\/li\u003e\n\n\u003cli\u003eHelps reduce artificial light pollution interference\u003c\/li\u003e\n\n\u003cli\u003eDeveloped under the supervision of astrophotographer Akio Nakanishi\u003c\/li\u003e\n\n\u003cli\u003eIdeal for deep-sky astrophotography\u003c\/li\u003e\n\n\u003cli\u003eSuitable for astro-modified cameras and astro models\u003c\/li\u003e\n\n\u003cli\u003eSupports long-exposure astrophotography workflows\u003c\/li\u003e\n\n\u003cli\u003eExcellent for capturing emission nebulae and night sky scenes\u003c\/li\u003e\n\n\u003cli\u003eCompatible with square filter holder systems\u003c\/li\u003e\n\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\n\u003ch3 style=\"font-size:26px;\"\u003e\nDesigned for Nebula Photography\n\u003c\/h3\u003e\n\n\u003cp\u003e\nNebula photography requires capturing extremely faint light emitted by deep-sky objects.\nThe KANI R640 filter helps isolate useful wavelengths associated with H-alpha emissions while suppressing unwanted visible light and artificial lighting contamination.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThis allows astrophotographers to capture cleaner images with improved contrast and more visible nebula structures, especially in environments affected by urban or suburban light pollution.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThe filter is especially useful for photographing emission nebulae where H-alpha sensitivity plays an important role in image quality and nebula visibility.\n\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:26px;\"\u003e\nOptimized for Astrophotography\n\u003c\/h3\u003e\n\n\u003cp\u003e\nThe 100x100mm square format makes this filter suitable for photographers using square filter holder systems.\nIt can be used with a variety of lenses depending on the holder and adapter configuration.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThe filter is ideal for long-exposure astrophotography workflows where stable optical quality and effective light pollution reduction are essential for capturing detailed night sky images.\n\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:26px;\"\u003e\nExposure Multiplier\n\u003c\/h3\u003e\n\n\u003cp\u003e\nExposure compensation varies depending on the camera type, infrared sensitivity, and light pollution conditions.\n\u003c\/p\u003e\n\n\u003cul style=\"padding-left:22px;\"\u003e\n\n\u003cli\u003e\nAstro-modified cameras and manufacturer astro models with strong H-alpha sensitivity typically require approximately 5x to 6x exposure compensation.\n\u003c\/li\u003e\n\n\u003cli\u003e\nIn environments with strong light pollution, exposure compensation may exceed 10x due to the powerful light pollution reduction effect.\n\u003c\/li\u003e\n\n\u003cli\u003e\nStandard DSLR cameras without astro modification may require exposure compensation above 10x because of lower sensitivity to wavelengths longer than 640nm.\n\u003c\/li\u003e\n\n\u003c\/ul\u003e\n\n\u003ch3 style=\"font-size:26px;\"\u003e\nRecommended Applications\n\u003c\/h3\u003e\n\n\u003cul style=\"padding-left:22px;\"\u003e\n\n\u003cli\u003eNebula photography\u003c\/li\u003e\n\n\u003cli\u003eDeep-sky astrophotography\u003c\/li\u003e\n\n\u003cli\u003eEmission nebula imaging\u003c\/li\u003e\n\n\u003cli\u003eH-alpha enhanced photography\u003c\/li\u003e\n\n\u003cli\u003eNight sky photography\u003c\/li\u003e\n\n\u003cli\u003eLong exposure astrophotography\u003c\/li\u003e\n\n\u003cli\u003eUrban astrophotography with light pollution reduction\u003c\/li\u003e\n\n\u003cli\u003eCreative astronomical imaging\u003c\/li\u003e\n\n\u003c\/ul\u003e\n\n\u003ch3 style=\"font-size:26px;\"\u003e\nSpecifications\n\u003c\/h3\u003e\n\n\u003ctable style=\"width:100%; border-collapse:collapse; margin:20px 0;\"\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:12px; background:#f8f8f8;\"\u003e\nProduct Name\n\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:12px;\"\u003e\nKANI R640 Nebula Photography Filter\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:12px; background:#f8f8f8;\"\u003e\nFilter Size\n\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:12px;\"\u003e\n100x100mm\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:12px; background:#f8f8f8;\"\u003e\nFilter Type\n\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:12px;\"\u003e\nNebula \/ Astrophotography Filter\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:12px; background:#f8f8f8;\"\u003e\nMain Purpose\n\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:12px;\"\u003e\nNebula imaging and light pollution reduction\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:12px; background:#f8f8f8;\"\u003e\nRecommended Camera\n\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:12px;\"\u003e\nAstro-modified cameras \/ Manufacturer astro models recommended\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003c\/table\u003e\n\n\u003cdiv style=\"background:#fff7e6; border-left:5px solid #d99a00; padding:20px; margin:35px 0;\"\u003e\n\n\u003cstrong\u003eImportant Note\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\n\nExposure settings may vary depending on the camera sensor, modification type, shooting environment, and light pollution conditions.\nFor optimal performance, use with cameras that provide strong H-alpha sensitivity.\n\n\u003c\/div\u003e\n\n\u003ch3 style=\"font-size:26px;\"\u003e\nWhy Choose KANI Astrophotography Filters\n\u003c\/h3\u003e\n\n\u003cp\u003e\nKANI filters are trusted by photographers worldwide for their optical quality, durability, and reliable performance.\nThe R640 Nebula Photography Filter was developed specifically for astrophotographers who require better nebula visibility, effective light pollution reduction, and stable image quality during long-exposure imaging.\n\u003c\/p\u003e\n\n\u003cp\u003e\nWhether photographing nebulae under dark skies or challenging urban environments, the KANI R640 filter helps create cleaner, sharper, and more dramatic deep-sky images.\n\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"KANI","offers":[{"title":"Default Title","offer_id":53898116563310,"sku":"K04006","price":217.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0986\/0238\/5774\/files\/K04006_03.jpg?v=1781230259"}],"url":"https:\/\/kanifilterjapan.com\/collections\/astrophotography-filter.oembed","provider":"kanfilterjapan","version":"1.0","type":"link"}