{"product_id":"svbony-sv223-90-clicklock-dielectric-mirror-diagonal-2in","title":"SVBONY SV223 90° ClickLock Dielectric Mirror Diagonal - 2\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFeatures a 2-inch barrel with a \u0026gt;99% reflectivity dielectric mirror\u003c\/li\u003e\n\u003cli\u003eConvenient Clicklock clamping mechanism for secure eyepiece attachment\u003c\/li\u003e\n\u003cli\u003eDeflects light at a 90° angle for comfortable viewing\u003c\/li\u003e\n\u003cli\u003eIncludes a 2-inch to 1.25-inch adapter for wide accessory compatibility\u003c\/li\u003e\n\u003cli\u003eNosepiece is threaded for standard M48x0.75 2-inch 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\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 SV223 2\" 90° Clicklock Dielectric Telescope Diagonal\u003c\/h2\u003e\n\u003cp\u003eThe Svbony SV223 diagonal combines a high-efficiency optical system with a modern clamping mechanism, delivering bright, high-contrast images through a secure, non-marring interface. Its dielectric mirror provides greater than 99% reflectivity across the visual spectrum, while the 11.5mm thick mirror substrate ensures thermal and mechanical stability. A generous 43mm clear aperture minimizes vignetting with wide-field 2-inch eyepieces, and the entire optical path is housed within a rigid metal body with an optical length of approximately 109.1mm.\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\u003e\u0026gt;99% Reflectivity from a 11.5mm Thick Dielectric Mirror\u003c\/h3\u003e\n\u003cp\u003eAt the core of the SV223 is a dielectric-coated mirror engineered for maximum light throughput. With a measured reflectivity of over 99%, it transmits nearly all collected light to your eyepiece, resulting in brighter views of faint deep-sky objects and higher contrast on planetary surfaces. The 11.5mm thick mirror provides a rigid, stable optical surface that resists flexure and maintains flatness for sharp, detailed images.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDielectric Coatings:\u003c\/strong\u003e Unlike standard aluminum or silver coatings that can degrade over time, dielectric layers are highly durable and maintain their \u0026gt;99% reflectivity for years of use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Contrast Baffling:\u003c\/strong\u003e The interior of the diagonal is machined with anti-reflection baffling to absorb stray light, ensuring a dark background sky and improving contrast during lunar and planetary observation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e43mm Clear Aperture:\u003c\/strong\u003e The large clear aperture prevents the light cone from being clipped, fully illuminating the field stop of even the widest 2-inch eyepieces.\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\u003eThe SV223 Clicklock System: Secure, Centered Clamping\u003c\/h3\u003e\n\u003cp\u003eThe Clicklock mechanism replaces traditional thumbscrews with a fast, secure, and self-centering clamping system. A simple twist of the knurled ring locks or unlocks your eyepiece, applying even pressure around the barrel for a solid connection that eliminates wobble and protects your accessories from scratches.\u003c\/p\u003e\n\u003cp\u003eThis system is especially useful for imagers and visual observers who frequently change eyepieces or cameras. The brass compression ring ensures a firm grip without marring the eyepiece barrel, preserving the value and condition of your equipment. An internal safety stop also prevents long eyepiece barrels from making contact with the mirror surface.\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\u003eM48 Threads and 1.25-inch Adapter for Full System Integration\u003c\/h3\u003e\n\u003cp\u003eThe Svbony SV223 is designed for broad compatibility with modern telescope systems. The 2-inch nosepiece features standard M48x0.75 filter threads, allowing you to attach nebula, light pollution, or color filters directly to the diagonal for system-wide filtration.\u003c\/p\u003e\n\u003cp\u003eFor observers with a mixed collection of eyepieces, the included 2-inch to 1.25-inch adapter provides seamless integration. This heavy-duty adapter also uses a non-marring brass compression ring, extending the same protection to your 1.25-inch accessories. The 90° viewing angle provides a comfortable observing position, reducing neck strain when viewing objects high in the sky.\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\u003eSvbony SV223 vs. Baader Clicklock: A Comparative Look\u003c\/h3\u003e\n\u003cp\u003eThe Baader Planetarium 2\" ClickLock diagonal is the established benchmark for this type of accessory, known for its exceptional German-made optical and mechanical precision. The Svbony SV223 adopts the same core concepts—a dielectric mirror and a twist-lock clamping mechanism—to offer a similar user experience at a more accessible price point.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompetitor Advantage (Baader):\u003c\/strong\u003e Baader diagonals typically specify a higher optical surface flatness (e.g., 1\/10λ) and are manufactured to extremely tight tolerances, which can provide a slight edge in image sharpness at very high magnifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThis Product's Advantage (Svbony SV223):\u003c\/strong\u003e The SV223 provides the key functional benefits of a Clicklock system and a \u0026gt;99% reflective dielectric mirror, making it a significant upgrade over standard diagonals. For most visual applications, it delivers comparable brightness and convenience for a fraction of the cost of the premium alternative.\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\"\u003eWhat is the main benefit of the SV223's Clicklock system over thumbscrews?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Clicklock system on the Svbony SV223 provides a more secure, self-centering grip on your eyepieces. Unlike thumbscrews that can cause tilt and scratch the barrel, the Clicklock's brass compression ring applies uniform pressure with a simple twist, ensuring perfect alignment and protecting your accessories from damage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the \u0026gt;99% reflectivity of the SV223 help when viewing the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA standard aluminum diagonal might reflect only 88-92% of the light. The Svbony SV223's \u0026gt;99% reflectivity dielectric mirror transmits significantly more of the faint light from M42 to your eye. This results in a brighter image, allowing you to see more of the faint, extended nebulosity and potentially resolve finer detail within the Trapezium star cluster.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Svbony SV223 diagonal work with my 8\" SCT and 2\" eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the SV223 is an excellent choice for a Schmidt-Cassegrain Telescope (SCT). It fits directly into the 2-inch visual back of most SCTs and its 43mm clear aperture is large enough to prevent vignetting with wide-field 2-inch eyepieces. The 90° angle is ideal for the comfortable viewing posture required with an SCT on an equatorial mount.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"mirror inverted\" mean for the SV223's image orientation?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV223 produces an image that is correctly oriented up-and-down (erect image) but is reversed left-to-right (mirror inverted). This is normal for all mirror diagonals and is perfectly fine for astronomical viewing, as there is no \"correct\" left or right in space. However, it is not ideal for terrestrial viewing where you need a fully corrected image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use 2\" filters with the Svbony SV223 diagonal?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The 2-inch nosepiece of the SV223 that inserts into your telescope's focuser is threaded with standard M48x0.75 threads. This allows you to screw in any standard 2-inch astronomy filter, such as a UHC or O-III filter for nebula viewing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the included 1.25\" adapter on the SV223 also non-marring?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the 2-inch to 1.25-inch adapter included with the SV223 also features a brass compression ring. This ensures that both your 2-inch and 1.25-inch eyepieces are protected from the scratches and gouges that can be caused by traditional set-screw designs.\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\u003eSV223\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003e90° Mirror Diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e2-inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClear Aperture\u003c\/td\u003e\n\u003ctd\u003e43mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReflectivity\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;99%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReflection Surface\u003c\/td\u003e\n\u003ctd\u003eDielectrically Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Thickness\u003c\/td\u003e\n\u003ctd\u003e11.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClamping System\u003c\/td\u003e\n\u003ctd\u003eClicklock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyepiece Side Connection\u003c\/td\u003e\n\u003ctd\u003e2-inch Clamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Side Connection\u003c\/td\u003e\n\u003ctd\u003e2-inch Barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eM48x0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Length\u003c\/td\u003e\n\u003ctd\u003eapprox. 109.1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Orientation\u003c\/td\u003e\n\u003ctd\u003eErect image, Mirror Inverted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eMetal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e573.7g (20.24oz)\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\"\u003eSV223 2\" 90° Clicklock Dielectric Diagonal Mirror\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\"\u003e2\" to 1.25\" Adapter\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\"\u003eM4 Screws\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\"\u003eDust Cap\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\"\u003eDust Plug\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\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":"Default Title","offer_id":52861237821725,"sku":"SV-W9180B","price":151.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV223-2-90-Clicklock-Dielectric-Telescope-Diagonal-1_2c9fe056-b1cd-4aa4-b004-7842daefb1a0.jpg?v=1788883648","url":"https:\/\/davidastro.com\/products\/svbony-sv223-90-clicklock-dielectric-mirror-diagonal-2in","provider":"David Astro","version":"1.0","type":"link"}