{"product_id":"svbony-sv188p-2in-dielectric-mirror-star-diagonal-high-reflectivity","title":"SVBONY SV188P 2in Dielectric Mirror Star Diagonal - High Reflectivity","description":"\u003cp\u003eIn this review the SVBONY SV188P 2in dielectric mirror star diagonal is evaluated for amateur and intermediate telescope users who want brighter, cleaner views and a comfortable 90 degree eyepiece angle. The single biggest reason to consider this diagonal is its \u003cstrong\u003edielectric coating with up to 99% reflectivity\u003c\/strong\u003e, which preserves light and contrast compared with enhanced aluminum alternatives. The diagonal ships with a 2in to 1.25in converter, uses a brass compression ring and an eyepiece anti-contact block to protect optics, and is finished internally to reduce stray light for clearer images.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-reflective dielectric coating:\u003c\/strong\u003e Delivers up to 99% reflectivity for improved brightness and contrast across the field of view.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2in format with 1.25in adapter:\u003c\/strong\u003e Accepts 2in eyepieces and filters while including a converter for 1.25in eyepiece compatibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable mechanical design:\u003c\/strong\u003e Aluminum alloy body with black bright oxidation finish provides a solid, attractive housing for field use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEyepiece protection system:\u003c\/strong\u003e Side screw locking with a brass pressure ring and anti-contact block reduces risk of scratching eyepiece barrels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterior stray light control:\u003c\/strong\u003e Matte paint and a velvet-lined burgundy cover minimize internal reflections for a cleaner image.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e90 degree viewing and upright image:\u003c\/strong\u003e Provides a comfortable observing angle and upright orientation that reduces the need for post-image processing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe SV188P is a good choice for backyard observers using 2in focusers or larger refractors who value maximum light transfer and straightforward mechanical protection for their eyepieces. Users who frequently switch between 2in and 1.25in eyepieces will appreciate the included converter and the ability to fit 2in filters.\u003c\/p\u003e\n\u003cp\u003eThose who need extreme color-critical imaging or who require mirror diagonals for specialized instrumentation should compare options; a few customers reported mixed results on color accuracy. Observers with only 1.25in focusers who never use 2in accessories may find the larger format unnecessary.\u003c\/p\u003e\n\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExcellent light transfer and contrast from the \u003cstrong\u003edielectric mirror\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eSolid build with aluminum alloy body and an attractive black oxidation finish.\u003c\/li\u003e\n\u003cli\u003eThoughtful eyepiece protection via a brass pressure ring and anti-contact block.\u003c\/li\u003e\n\u003cli\u003eInternal matte treatment effectively reduces stray light for clearer views.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome users noted mixed results with color accuracy compared with other diagonals.\u003c\/li\u003e\n\u003cli\u003eLarge 2in format may be overkill for observers who only use 1.25in eyepieces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eFormat\u003c\/td\u003e\n\u003ctd\u003e2in diagonal with 2in to 1.25in converter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReflective coating\u003c\/td\u003e\n\u003ctd\u003eHigh-reflective dielectric coating, up to 99% reflectivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror quality\u003c\/td\u003e\n\u003ctd\u003eHigh-precision plane mirror, 1\/4 wavelength error\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody material\u003c\/td\u003e\n\u003ctd\u003eAluminum alloy with black bright oxidation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLocking design\u003c\/td\u003e\n\u003ctd\u003eSide screw locking with brass pressure ring and anti-contact block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStray light control\u003c\/td\u003e\n\u003ctd\u003eMatte interior paint and velvet-lined burgundy cover\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV188P 2in dielectric mirror diagonal is a practical upgrade for observers who want brighter, higher-contrast views and a durable, eyepiece-friendly mechanical design. It represents good value for visual work, especially with larger refractors and when using 2in eyepieces or filters, though those prioritizing absolute color fidelity for imaging should compare alternatives.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this fit 1.25in eyepieces?\u003c\/strong\u003e\u003cbr\u003eYes. The diagonal includes a 2in to 1.25in converter so it can accept 1.25in eyepieces and accessories.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the diagonal change the image orientation?\u003c\/strong\u003e\u003cbr\u003eThe diagonal provides an upright image for comfortable observation at a 90 degree angle; it is intended for visual observing, not for providing a mirrored or flipped output for imaging rigs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does it control stray light?\u003c\/strong\u003e\u003cbr\u003eThe interior is treated with matte paint and a velvet-lined burgundy cover to reduce internal reflections and improve contrast.\u003c\/p\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":48189138305243,"sku":"B0DLL5W5Y3","price":74.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/519lPOP3p_L._AC_SL1500.jpg?v=1769446886","url":"https:\/\/gearmusthave.com\/products\/svbony-sv188p-2in-dielectric-mirror-star-diagonal-high-reflectivity","provider":"GearMustHave","version":"1.0","type":"link"}