{"product_id":"svbony-sv580-80mm-f-4-5-petzval-apo-astrograph-50-pre-order-deposit","title":"SVBONY SV580 80mm f\/4.5 Petzval APO Astrograph – £50 Pre-order Deposit","description":"\u003ch2\u003eReserve the new SVBONY SV580 with a £50 deposit\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e£50 is the reservation deposit only. The full UK price is still to be confirmed. Expected delivery: December 2026.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eJoin the SVBONY UK pre-order list for the SV580 80mm f\/4.5 Petzval APO astrograph. Your deposit is credited in full against the final purchase price.\u003c\/p\u003e\n\u003ch3\u003eHow your reservation works\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePay £50 today\u003c\/strong\u003e to reserve one SV580.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWe will contact you\u003c\/strong\u003e when the final UK price is confirmed, and keep you updated ahead of the expected December 2026 delivery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDecide whether to proceed.\u003c\/strong\u003e If you go ahead, your £50 is deducted from the total and we will explain how and when to pay the remaining balance. The balance will not be charged automatically.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChanged your mind?\u003c\/strong\u003e Contact SVBONY UK to cancel your reservation and receive a full refund of the £50 deposit before paying the balance.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eThis reservation does not fix the telescope’s final price or guarantee a particular delivery date or first-batch allocation. No telescope is dispatched when the deposit is paid. Any delivery charge will be confirmed with the final quotation before you decide to proceed.\u003c\/p\u003e\n\u003ch3\u003eA wide-field astrograph for your imaging rig\u003c\/h3\u003e\n\u003cp\u003eThe SV580 brings together an 80mm aperture, 360mm focal length and fast f\/4.5 focal ratio. SVBONY specifies a six-element, four-group Petzval APO design with two ED elements and an integrated field flattener, supporting a 44mm image circle.\u003c\/p\u003e\n\u003cp\u003eThat short focal length is a useful starting point for framing expansive nebulae and star fields. Your camera’s sensor size will determine the precise framing; mount, camera and other imaging equipment should be chosen to suit your intended targets.\u003c\/p\u003e\n\u003ch3\u003eManufacturer-announced specifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eAperture\u003c\/th\u003e\n\u003ctd\u003e80mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eFocal length\u003c\/th\u003e\n\u003ctd\u003e360mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eFocal ratio\u003c\/th\u003e\n\u003ctd\u003ef\/4.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eOptical design\u003c\/th\u003e\n\u003ctd\u003ePetzval APO; 6 elements in 4 groups; dual ED glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eField correction\u003c\/th\u003e\n\u003ctd\u003eBuilt-in field flattener\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eImage circle\u003c\/th\u003e\n\u003ctd\u003e44mm; designed for full-frame and APS-C imaging\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eWe will add confirmed package contents, dimensions, weight and connection details when available. Please check the final specification before buying adapters or other accessories.\u003c\/p\u003e\n\u003ch3\u003eCamera framing at 360mm\u003c\/h3\u003e\n\u003cp\u003eThe examples below show the approximate sky coverage for three sensor sizes. These are calculated geometric fields of view, not measured corner-performance or illumination claims.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eSensor format\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eExample sensor dimensions\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eApproximate field of view\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull frame\u003c\/td\u003e\n\u003ctd\u003e36 × 24mm\u003c\/td\u003e\n\u003ctd\u003e5.72° × 3.82°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAPS-C example\u003c\/td\u003e\n\u003ctd\u003e23.5 × 15.7mm\u003c\/td\u003e\n\u003ctd\u003e3.74° × 2.50°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSmall square sensor example\u003c\/td\u003e\n\u003ctd\u003e11.3 × 11.3mm\u003c\/td\u003e\n\u003ctd\u003e1.80° × 1.80°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eSensor dimensions vary between cameras. Use your camera’s actual active sensor dimensions when planning a composition. These fields suit wide-field imaging; smaller galaxies and planetary detail generally benefit from longer focal lengths.\u003c\/p\u003e\n\u003ch3\u003eImage scale and camera selection\u003c\/h3\u003e\n\u003cp\u003eAt the native 360mm focal length, 3.76µm pixels give a calculated image scale of approximately \u003cstrong\u003e2.15 arcseconds per pixel\u003c\/strong\u003e. For comparison, 2.9µm pixels give 1.66 arcseconds per pixel and 4.63µm pixels give 2.65 arcseconds per pixel. These are unbinned sampling figures, not a guarantee of resolved detail; seeing, focus and tracking also affect the result.\u003c\/p\u003e\n\u003ch3\u003eUnderstanding the full-frame image circle\u003c\/h3\u003e\n\u003cp\u003eA 36 × 24mm sensor has a diagonal of approximately 43.3mm, which fits within the manufacturer-stated 44mm image circle. Camera adapters and filters still need sufficient clear aperture to avoid clipping the light cone. Flat-field calibration remains useful, and full-frame coverage does not itself guarantee identical illumination or star shapes across the sensor.\u003c\/p\u003e\n\u003ch3\u003eFocusing and imaging-train planning\u003c\/h3\u003e\n\u003cp\u003eSVBONY lists compatibility with EAF focusing systems and imaging accessories. Exact motor brackets, adapter threads, focuser travel and spacing instructions have not yet been confirmed here. Do not assume a standard 55mm spacing requirement or that a particular adapter is included.\u003c\/p\u003e\n\u003cp\u003eThe integrated field correction means a separate field flattener is not required for the advertised native configuration. A suitable tracking mount, camera and compatible connections are still needed to build a working imaging rig.\u003c\/p\u003e\n\u003cp\u003e\u003csmall\u003eOptical specifications and general compatibility are based on \u003ca href=\"https:\/\/www.svbony.com\/products\/sv580-80mm-f4-5-petzval-apo-full-frame-astrograph\" target=\"_blank\" rel=\"noopener\"\u003eSVBONY’s SV580 announcement\u003c\/a\u003e. Field-of-view and sampling figures above are our calculations using the announced 360mm focal length.\u003c\/small\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs the telescope £50?\u003c\/strong\u003e\u003cbr\u003eNo. £50 is a refundable reservation deposit towards a telescope whose final UK price is to be confirmed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs there an early-bird discount?\u003c\/strong\u003e\u003cbr\u003eNo discounted final price has been confirmed. Any launch offer will be explained when pricing is announced.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen will it arrive?\u003c\/strong\u003e\u003cbr\u003eDelivery is expected in December 2026. This is an estimate; we will keep reservation customers informed if the schedule changes.\u003c\/p\u003e","brand":"SVBONY UK","offers":[{"title":"£50 refundable deposit — final price TBC","offer_id":58925718110540,"sku":"SV580-DEPOSIT-50","price":50.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/4506\/6060\/files\/svbony-sv580-80mm-petzval-astrograph.webp?v=1790189095","url":"https:\/\/svbonyuk.com\/products\/svbony-sv580-80mm-f-4-5-petzval-apo-astrograph-50-pre-order-deposit","provider":"SVBONY UK ","version":"1.0","type":"link"}