{"product_id":"explore-scientific-310250","title":"Explore Scientific 2\" Variable Polarizing Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e2\" Filter Barrel Size\u003c\/li\u003e\n\u003cli\u003eContinuously Variable Brightness\u003c\/li\u003e\n\u003cli\u003eIdeal for Lunar, Planetary, and Solar Observing\u003c\/li\u003e\n\u003cli\u003eNeutral Gray Color Rendition\u003c\/li\u003e\n\u003cli\u003eStackable with Other 2\" Filters\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\u003eDownloads\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\u003e2\" Variable Polarizing Filter\u003c\/h2\u003e\n\u003cp\u003eThe 2\" Variable Polarizing Filter offers continuous brightness adjustment for any 2\" eyepiece, allowing you to dial down intense glare from the Moon and planets. This dual-threaded 2\" filter makes it possible to perfectly tailor the view to your target, revealing fine details that are washed out by excessive light.\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\u003eContinuously Variable Brightness Control for Your 2\" Eyepieces\u003c\/h3\u003e\n\u003cp\u003eUnlike fixed neutral density filters, this 2\" variable polarizer allows you to fine-tune image brightness on the fly. A simple rotation of the filter's two-part housing adjusts the light transmission, giving you precise control to match the viewing conditions and your target's brightness perfectly. The filter provides a neutral gray image, ensuring that colors remain true without any distracting tint.\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\u003eEliminate Glare on the Moon, Planets, and Sun\u003c\/h3\u003e\n\u003cp\u003eBright celestial objects like the full Moon and planets can be so dazzling that they hide subtle surface features. This 2\" filter acts like a dimmer switch for your telescope, reducing glare to reveal lunar rilles, planetary cloud bands, and delicate crater ejecta. It prevents the \"blooming\" effect that washes out high-contrast details.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCritical Solar Safety:\u003c\/strong\u003e For solar viewing, this 2\" filter is an essential tool for managing brightness but must \u003cstrong\u003eonly\u003c\/strong\u003e be used in conjunction with a dedicated, professional-grade solar filter (like a full-aperture white light filter or a Herschel wedge). It is not a standalone solar filter and will not protect your eyes from harmful radiation if used alone.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eStackable 2\" Design for Advanced Filter Combinations\u003c\/h3\u003e\n\u003cp\u003eEngineered for maximum utility, this filter features standard 2\" threads on both sides (internal and external). This design allows you to stack it with other 2\" filters from your collection. You can combine it with a color filter to enhance features on Mars or Jupiter while simultaneously controlling the planet's intense brightness.\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\u003eVariable Polarizer vs. Fixed ND Filters: The Control Advantage\u003c\/h3\u003e\n\u003cp\u003eWhile a fixed Neutral Density (ND) filter provides a single level of light reduction, a variable polarizer offers a major advantage in flexibility.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed ND Filter Advantage:\u003c\/strong\u003e A single ND filter is a simple, set-it-and-forget-it solution for a specific brightness level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2\" Variable Polarizer Advantage:\u003c\/strong\u003e This single filter effectively replaces an entire set of fixed ND filters. You can adjust for changing atmospheric seeing, different eyepiece magnifications, or the varying phases of the Moon without ever needing to swap filters at the eyepiece.\u003c\/li\u003e\n\u003c\/ul\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\"\u003eHow do I adjust the brightness with the 2\" Variable Polarizing Filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eOperation is simple: thread the 2\" filter onto your eyepiece or accessory, then slowly rotate the filter's housing. As you turn it, you will see the image dim or brighten, allowing you to set the perfect level of light transmission for your target.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this 2\" Variable Polarizing Filter for looking at the Sun?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, but \u003cstrong\u003eONLY\u003c\/strong\u003e as a secondary filter. For safe solar viewing, you \u003cstrong\u003eMUST\u003c\/strong\u003e use this polarizing filter in combination with a dedicated, professional-grade, full-aperture solar filter or a Herschel wedge. Never use this filter as the primary or only protection for solar observation, as it does not block harmful UV and IR radiation and will result in permanent eye damage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will this 2\" filter improve my view of Jupiter with an 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eOn a bright planet like Jupiter, this 2\" filter reduces glare that can wash out subtle details. By dimming the image to a comfortable level, you can more easily see fine cloud bands, the Great Red Spot, and shadow transits of the Galilean moons. The neutral gray tint ensures Jupiter's colors remain true.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this 2\" filter useful for observing the full Moon?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The full Moon is bright enough to be uncomfortable and cause temporary flash-blindness, hiding fine details. This 2\" variable filter allows you to dim the view significantly, revealing incredible detail in crater walls, rays, and rilles without being overwhelmed by glare.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 2\" Variable Polarizing Filter add any color to the view?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The filter is designed to provide a neutral gray filter effect. It reduces brightness across the visual spectrum evenly, so the natural colors of the Moon, planets, and stars remain unchanged.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I stack this 2\" variable polarizer with other filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The filter features both internal and external 2\" filter threads. This allows you to stack it with other filters, such as a color filter to enhance planetary features or a light pollution filter, giving you combined filtering effects.\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\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e4007922041025\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\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":52909408321821,"sku":"ES-310250","price":179.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/ExploreScientific-2-Variable-Polarizing-Filter-1_3f3af942-fd85-4fb0-9bd3-87d547e5b2d8.jpg?v=1789061604","url":"https:\/\/davidastro.com\/en-us\/products\/explore-scientific-310250","provider":"David Astro","version":"1.0","type":"link"}