{"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","url":"https:\/\/kanifilterjapan.com\/products\/r-640-150x150mm","provider":"kanfilterjapan","version":"1.0","type":"link"}