{"product_id":"svbony-sv139-nd3-0-neutral-density-moon-filter-125in","title":"SVBONY SV139 ND3.0 Neutral Density Moon Filter - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eND3.0 Neutral Density Filter\u003c\/li\u003e\n\u003cli\u003eStandard 1.25-inch Barrel Size\u003c\/li\u003e\n\u003cli\u003eTransmits 0.1% of Incoming Light (10-Stop \/ 1000× Reduction)\u003c\/li\u003e\n\u003cli\u003eIdeal for Herschel Solar Wedges \u0026amp; Solar Imaging Accessories\u003c\/li\u003e\n\u003cli\u003eFully Multi-Coated Optical Glass in Black Anodized Aluminum Cell\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSVBONY SV139 1.25-inch ND3.0 Neutral Density Filter\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV139 1.25-inch ND3.0 Neutral Density filter provides an intense 0.1% light transmission (a 10-stop or 1000× reduction) without altering natural color rendition. This specialized filter threads directly into standard 1.25-inch eyepieces and accessories, serving as an essential light attenuation tool primarily used alongside Herschel solar wedges, dedicated solar setups, and specialized solar imaging rigs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eND3.0 Transmission: Safe Light Reduction for Solar Wedges \u0026amp; Imaging\u003c\/h3\u003e\n\u003cp\u003eBecause an ND3.0 filter cuts 99.9% of incoming light, it is far too dark for nighttime lunar or planetary observation. Instead, its core application is downstream solar light control. When paired with a Herschel solar wedge (which reflects 95–96% of sunlight away), the SV139 ND3.0 filter safely steps down the remaining intense beam to a comfortable level for white-light solar viewing of sunspots, granulation, and solar faculae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eMulti-Coated Optical Glass in a Standard 1.25\" Cell\u003c\/h3\u003e\n\u003cp\u003eConstructed with high-quality fully multi-coated optical glass, the SV139 minimizes internal reflections and maintains crisp image contrast. The standard 1.25-inch cell features double-sided threads (M28.5 x 0.6mm), allowing you to easily stack it with a Polarizing filter or a solar continuum filter for further light fine-tuning.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main use for an ND3.0 filter in astronomy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn \u003cstrong\u003eND3.0 filter\u003c\/strong\u003e reduces light intensity by 99.9% (transmitting just 0.1%, or a 10-stop reduction). Because it is so dark, it is primarily used in solar observation downstream of a Herschel solar wedge to bring the remaining light down to safe, comfortable visual or photographic levels.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I look at the Sun using ONLY this ND3.0 filter on my eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eNO. NEVER use an ND3.0 filter alone at the eyepiece for solar viewing.\u003c\/strong\u003e Unfiltered sunlight focused by a telescope aperture will instantly shatter or melt an eyepiece filter and cause permanent blindness. An ND3.0 filter must only be used \u003cem\u003ebehind\u003c\/em\u003e a proper front-aperture solar filter or inside a dedicated Herschel solar wedge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SVBONY ND3.0 filter for nighttime viewing of the Moon?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, an ND3.0 filter is generally far too dark for nighttime lunar observing. Cutting 99.9% of the light will render the lunar surface dim and difficult to perceive. For visual lunar observing, lighter filters like ND0.6 (25% transmission), ND0.9 (12.5% transmission), or ND1.2 (6.25% transmission) are recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow is the ND3.0 filter used with a Herschel Solar Wedge?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA Herschel wedge dumps ~95% of incoming solar energy out of its heat trap, but the remaining 5% light beam is still too bright for direct human eyes. Threading the ND3.0 filter into the wedge's eyepiece barrel reduces that remaining light by 99.9%, bringing the final view into a safe, comfortable intensity range for white-light solar observing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I stack the SVBONY SV139 ND3.0 with other filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The SV139 aluminum cell features threads on both sides. In solar setups, observers frequently stack an ND3.0 filter with a Variable Polarizer (to fine-tune brightness) or a Solar Continuum filter (to highlight sunspot details and contrast).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach the SVBONY SV139 filter to my setup?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe filter features standard 1.25-inch threads (M28.5 x 0.6mm). It simply threads onto the bottom barrel of any standard 1.25-inch eyepiece, camera nosepiece, or Herschel wedge accessory adapter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSVBONY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eSV139\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eNeutral Density (ND)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Density\u003c\/td\u003e\n\u003ctd\u003eND3.0 (0.1% Transmission \/ 10-Stop)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e1.25 in (M28.5 x 0.6 Thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSVBONY SV139 1.25\" ND3.0 Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003ePlastic Storage Case\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"1.25\" Round Mounted","offer_id":52861236085021,"sku":"SV-W9108D","price":9.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV139-Telescope-Filter-1-25inch-ND-Neutral-Density-For-Moon-Viewing-1-W9108D_f30713f0-55c3-4128-9cfc-0ce4e0594c16.jpg?v=1788660207","url":"https:\/\/davidastro.com\/fr-int\/products\/svbony-sv139-nd3-0-neutral-density-moon-filter-125in","provider":"David Astro","version":"1.0","type":"link"}