{"title":"Astrophotography Filter ( Square )","description":"\u003cp\u003eAstrophotography\u003c\/p\u003e","products":[{"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"},{"product_id":"r-640-150x150mm","title":"KANI R640 Nebula Photography Filter 150x150mm","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 150x150mm\n\u003c\/h2\u003e\n\n\u003cp\u003e\nThe KANI R640 150x150mm Nebula Photography Filter is a specialized square filter designed for astrophotography, especially for capturing nebulae and deep-sky objects with enhanced contrast.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThis filter was developed under the supervision of astrophotographer \u003cstrong\u003eAkio Nakanishi\u003c\/strong\u003e in response to requests from astrophotography enthusiasts.\nAlthough similar filters from major manufacturers were discontinued due to limited market demand, many astrophotographers still consider this type of filter highly valuable for nebula photography.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThe R640 filter helps improve the visibility of H-alpha emission regions while reducing unwanted light pollution, making it useful for photographing nebulae from both dark-sky locations and areas affected by artificial light.\n\u003c\/p\u003e\n\n\u003cdiv style=\"background:#f5f5f5; padding:22px; border-radius:12px; margin:35px 0;\"\u003e\n\u003ch3 style=\"font-size:26px; margin-top:0;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"padding-left:22px; margin-bottom:0;\"\u003e\n\u003cli\u003eSpecialized square filter for nebula and astrophotography\u003c\/li\u003e\n\u003cli\u003e150x150mm size for large square filter holder systems\u003c\/li\u003e\n\u003cli\u003eEnhances nebula contrast and H-alpha emission visibility\u003c\/li\u003e\n\u003cli\u003eHelps reduce the influence of light pollution\u003c\/li\u003e\n\u003cli\u003eDeveloped under the supervision of astrophotographer Akio Nakanishi\u003c\/li\u003e\n\u003cli\u003eSuitable for astro-modified cameras and manufacturer astro models\u003c\/li\u003e\n\u003cli\u003eUseful for long-exposure deep-sky photography\u003c\/li\u003e\n\u003cli\u003eIdeal for emission nebulae, night sky, and creative astrophotography\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"font-size:26px;\"\u003eProduct Description\u003c\/h3\u003e\n\n\u003cp\u003e\nNebula photography requires the ability to capture very faint light emitted from deep-sky objects.\nThe KANI R640 filter is designed to support this type of photography by emphasizing wavelengths useful for nebula imaging while reducing unnecessary light contamination.\n\u003c\/p\u003e\n\n\u003cp\u003e\nBy controlling unwanted visible light and suppressing the effects of light pollution, the R640 filter can help create cleaner images with improved contrast around nebula structures.\nThis is especially helpful when shooting in locations where city lights or artificial illumination affect the night sky.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThe 150x150mm square format is suitable for photographers using square filter holder systems, allowing the filter to be used with a wide range of lenses depending on the holder and adapter configuration.\n\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:26px;\"\u003eExposure Multiplier\u003c\/h3\u003e\n\n\u003cp\u003e\nThe exposure multiplier of the R640 filter depends on the camera type, sensor sensitivity, and shooting environment.\n\u003c\/p\u003e\n\n\u003cul style=\"padding-left:22px;\"\u003e\n\u003cli\u003e\nFor manufacturer astro models and astro-modified cameras with high sensitivity to H-alpha wavelengths, the exposure multiplier is approximately 5x to 6x.\n\u003c\/li\u003e\n\u003cli\u003e\nIn areas with strong light pollution, exposure compensation may exceed 10x because the filter provides a strong light pollution reduction effect.\n\u003c\/li\u003e\n\u003cli\u003e\nFor standard non-modified DSLR cameras, the exposure multiplier is generally more than 10x because sensitivity to wavelengths longer than 640nm is limited.\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"font-size:26px;\"\u003eRecommended Applications\u003c\/h3\u003e\n\n\u003cul style=\"padding-left:22px;\"\u003e\n\u003cli\u003eNebula photography\u003c\/li\u003e\n\u003cli\u003eDeep-sky astrophotography\u003c\/li\u003e\n\u003cli\u003eH-alpha enhanced imaging\u003c\/li\u003e\n\u003cli\u003eNight sky photography\u003c\/li\u003e\n\u003cli\u003eLong-exposure astrophotography\u003c\/li\u003e\n\u003cli\u003eAstrophotography in light-polluted areas\u003c\/li\u003e\n\u003cli\u003eCreative astronomical imaging\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"font-size:26px;\"\u003eSpecifications\u003c\/h3\u003e\n\n\u003ctable style=\"width:100%; border-collapse:collapse; margin:20px 0;\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:12px; background:#f8f8f8;\"\u003eProduct Name\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:12px;\"\u003eKANI R640 Nebula Photography Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:12px; background:#f8f8f8;\"\u003eSize\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:12px;\"\u003e150x150mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:12px; background:#f8f8f8;\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:12px;\"\u003eNebula \/ Astrophotography Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:12px; background:#f8f8f8;\"\u003eMain Purpose\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:12px;\"\u003eNebula photography, H-alpha enhanced imaging, light pollution reduction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:12px; background:#f8f8f8;\"\u003eRecommended Camera\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:12px;\"\u003eAstro-modified cameras \/ Manufacturer astro models recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cdiv style=\"background:#fff7e6; border-left:5px solid #d99a00; padding:20px; margin:35px 0;\"\u003e\n\u003cstrong\u003eImportant Note\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\nExposure settings will vary depending on the camera model, modification type, lens, sky conditions, and level of light pollution.\nFor best results, use with cameras that have high sensitivity to H-alpha wavelengths, such as astro-modified cameras or manufacturer astro models.\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"KANI","offers":[{"title":"Default Title","offer_id":53898117579118,"sku":"K04007","price":249.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0986\/0238\/5774\/files\/K04007_02.jpg?v=1781230324"},{"product_id":"partial-soft-focus-170-190mm","title":"KANI Partial Soft Focus 170*190mm","description":"\u003cp\u003e\u003cstrong\u003ePartial Soft Focus Filter 170 x 190mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSKU Number : K03014\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eThis 170mm wide soft filter has a soft effect on 70% of the sky and the remaining 30% is clear. Especially for star scape photography, the ground side of the image can be sharp while the stars are well emphasized. This soft-effect filter is ideal for photographs with lighthouses, models, and night scenes on the ground side. It is designed to be used with soft effect on the whole surface. Therefore, there is no product name or other information on the filter. The product photo is an image only and is not grayed out.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e \u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eThe target holders are Canon 11-24mm f4, TS-E 17mm, Samyang 14mm f2.4, Zeiss 15mm f2.8, SIGMA 12-24mm f4, and SIGMA 14-24mm f2.8 DG HSM in 170mm width.\u003c\/p\u003e","brand":"KANI","offers":[{"title":"Default Title","offer_id":53898164928878,"sku":"K03014","price":237.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0986\/0238\/5774\/files\/3_b68cf211-43bf-444d-9914-1fd82756ebd0.jpg?v=1781232563"}],"url":"https:\/\/kanifilterjapan.com\/collections\/astrophotography-filter-square.oembed","provider":"kanfilterjapan","version":"1.0","type":"link"}