{"product_id":"used-orion-1-25-v-block-filter","title":"Used Orion 1.25\" V-Block Anti-Fringe Filter","description":"\u003cp\u003e\u003cspan\u003eThis is an Orion V-Block anti-fringing filter for use in achromatic refractors.  It blocks the violet and blue wavelengths to eliminate the halos that achromats show.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt is in excellent condition, with absolutely pristine, clean optics and body.  It comes in its original jewel case.  \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e   \u003c\/p\u003e\n\u003cp\u003e     \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cdiv id=\"description\" class=\"cnt-text-box\"\u003e\n\u003cdiv class=\"text-justify\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eWith refractor telescopes, it's normal to see some purple fringing or halos around bright objects such as the planets, Moon, and bright stars. Such false color, or chromatic aberration, results from the inability of a standard two-element (\"achromatic\") lens assembly to focus all wavelengths of light to a single point. The effect is particularly pronounced at high powers.\u003cbr\u003e\u003cbr\u003eBut if you are the type that thinks halos look better on angels than on astronomical objects, then Orion's V-Block telescope filter is for you. It effectively removes the distracting color halos from around bright objects, greatly improving image sharpness, color, contrast, and resolution.\u003cbr\u003eThe Orion V-Block telescope filter works amazingly well with achromatic refractor telescopes of any aperture or focal length. Its sophisticated coatings selectively block wavelengths in the violet and blue (\u0026lt; 450nm) end of the visible spectrum, while allowing up to 95% transmission of the other wavelengths.\u003cbr\u003e\u003cbr\u003eAnd you will find that you can push the magnification higher with the filter than without it because of the improved image definition. Objects also snap into focus more readily now that the fuzzy blue-violet fringe is attenuated.\u003cbr\u003eThis 1.25\" V-Block is a glass telescope filter encased in an anodized aluminum cell. It threads into telescope eyepieces, telescope diagonals, and barlow lenses threaded to accept 1.25\" filters. Effective for visual use as well as CCD or astrophotography. Comes with protective plastic case.\u003c\/p\u003e\n\u003cp\u003eWith refractor telescopes, it's normal to see some purple fringing or halos around bright objects such as the planets, Moon, and bright stars. Such false color, or chromatic aberration, results from the inability of a standard two-element (\"achromatic\") lens assembly to focus all wavelengths of light to a single point. The effect is particularly pronounced at high powers.\u003cbr\u003e\u003cbr\u003eBut if you are the type that thinks halos look better on angels than on astronomical objects, then Orion's V-Block telescope filter is for you. It effectively removes the distracting color halos from around bright objects, greatly improving image sharpness, color, contrast, and resolution.\u003cbr\u003eThe Orion V-Block telescope filter works amazingly well with achromatic refractor telescopes of any aperture or focal length. Its sophisticated coatings selectively block wavelengths in the violet and blue (\u0026lt; 450nm) end of the visible spectrum, while allowing up to 95% transmission of the other wavelengths.\u003cbr\u003e\u003cbr\u003eAnd you will find that you can push the magnification higher with the filter than without it because of the improved image definition. Objects also snap into focus more readily now that the fuzzy blue-violet fringe is attenuated.\u003cbr\u003eThis 1.25\" V-Block is a glass telescope filter encased in an anodized aluminum cell. It threads into telescope eyepieces, telescope diagonals, and barlow lenses threaded to accept 1.25\" filters. Effective for visual use as well as CCD or astrophotography. Comes with protective plastic case.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"specifications\" class=\"page-container\"\u003e\n\u003cdiv class=\"auto-col-container clearfix\"\u003e\n\u003cdiv class=\"single-col\"\u003e\n\u003ch2 class=\"hdl-01\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv class=\"box-container clearfix\"\u003e\n\u003cdiv class=\"pad-8v\"\u003e\n\u003cdiv class=\"pad-4v clearfix\"\u003e\n\u003ch3 class=\"fs-10re float-left\"\u003e\u003cb\u003eCapacity\u003c\/b\u003e\u003c\/h3\u003e\n\u003cdiv class=\"float-left\"\u003e\n\u003cdiv class=\"position-relative float-right\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"fm-icon float-left cursor-pointer\"\u003e\n\u003ci class=\"fa fa-info-circle fa-fw fs-10re tcl-02\"\u003e\u003c\/i\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003cdiv class=\"pad-2v clearfix\"\u003e\n\u003cdiv class=\"fix-2c float-left\"\u003e\n\u003cdiv class=\"float-left\"\u003eConnection (to the telescope)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"position-relative\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"float-left cursor-pointer\"\u003e\n\u003ci class=\"fa fa-info-circle fa-fw fs-10re tcl-02\"\u003e\u003c\/i\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fix-2c float-left\"\u003e\n\u003cdiv class=\"float-left\"\u003e1,25\"\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"position-relative\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"float-left cursor-pointer\"\u003e\n\u003ci class=\"fa fa-info-circle fa-fw fs-10re tcl-02\"\u003e\u003c\/i\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bgcl-01 pad-2v clearfix\"\u003e\n\u003cdiv class=\"fix-2c float-left\"\u003e\n\u003cdiv class=\"float-left\"\u003eCoating of optical system\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"position-relative\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"float-left cursor-pointer\"\u003e\n\u003ci class=\"fa fa-info-circle fa-fw fs-10re tcl-02\"\u003e\u003c\/i\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fix-2c float-left\"\u003e\n\u003cdiv class=\"float-left\"\u003emultiple\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pad-2v clearfix\"\u003e\n\u003cdiv class=\"fix-2c float-left\"\u003e\n\u003cdiv class=\"float-left\"\u003eMount material\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fix-2c float-left\"\u003e\n\u003cdiv class=\"float-left\"\u003eAluminium\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"productSafety\"\u003e\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion","offers":[{"title":"Default Title","offer_id":49358407860483,"sku":"U2608-XXX-VBLOCK125","price":50.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/9d7fded5-40bd-498c-a9d9-b6bfb0addd89.jpg?v=1785615428","url":"https:\/\/milehighastro.com\/products\/used-orion-1-25-v-block-filter","provider":"Mile High Astronomy","version":"1.0","type":"link"}