{"product_id":"vixen-vsd90ss-telescope-optical-tube-assembly-ota","title":"Vixen VSD90SS Telescope Optical Tube Assembly (OTA)","description":"\u003cp\u003eThe Vixen VSD90SS Optical Tube Assembly is a five-element astrograph with a fast focal ratio, using two SD lenses and one high-index ED lens. It produces sharp, well-corrected star images across the full field, even with full-frame and larger sensors.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSharp, beautiful star images across the entire large-format image field\u003c\/li\u003e\n\u003cli\u003eEngineered to consistently produce sharp, beautiful star images\u003c\/li\u003e\n\u003cli\u003eFully illuminated image circle with virtually no vignetting\u003c\/li\u003e\n\u003cli\u003eSmooth light distribution produces beautiful star images\u003c\/li\u003e\n\u003cli\u003eFlat imaging field!, 96.7% Strehl ratio!, Great visual observing!\u003c\/li\u003e\n\u003cli\u003eLarge, Versatile Focuser\u003c\/li\u003e\n\u003cli\u003ePrecision Drawtube Lock Lever\u003c\/li\u003e\n\u003cli\u003eCompatible with Motorized Focusers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eObjective Design \/ Effective Aperture:\u003c\/strong\u003e Five-group five-element SD Apochromat, AS coatings \/ 90mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFocal Length (Focal Ratio):\u003c\/strong\u003e 495mm (F5.5)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResolving Power・Limiting Magnitude:\u003c\/strong\u003e 1.29 arc seconds・11.5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLight Gathering Power:\u003c\/strong\u003e 165X unaided eye\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImage Circle:\u003c\/strong\u003e 60mmφ(Over 90% illumination at the round edge)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Tube Size・Weight:\u003c\/strong\u003e 115mm dia. X 600mm long (476mm long for storage), 4.3kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinderscope:\u003c\/strong\u003e Not included, 7X50mm Finder with illuminated reticle, 50mm XY Finder bracket II sold separately\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFocusing System:\u003c\/strong\u003e Rack-and-pinion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccessory Threads \/ Size:\u003c\/strong\u003e Threads\/ 84mm (pitch 1mm), 60mm (pitch 1.0mm), 42mm for T-ringPush-fit \/ 60.2mm, 50.8mm, and 31.7mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEyepiece (31.7mm):\u003c\/strong\u003e Not included, SLV series of eyepieces sold separately\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlates and\/or Tube Rings:\u003c\/strong\u003e Not included, VSD Tube Ring 115S, Dual Slide Bar sold separately\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProvided Accessories:\u003c\/strong\u003e VSD60.2 to 50.8 Adapter, 2mm and 1.5mm Allen wrenches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhotography:\u003c\/strong\u003e Eyepiece Projection, Prime Focus, and Aforcal Imaging with a smartphone are possible, *2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolar Observation:\u003c\/strong\u003e Using Sun projection screen Set B sold separately (Short-time observing is recommendable)*2\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Vixen","offers":[{"title":"Default Title","offer_id":54819582116124,"sku":"VX26131","price":8695.0,"currency_code":"AUD","in_stock":false}],"url":"https:\/\/www.magnumsports.com.au\/products\/vixen-vsd90ss-telescope-optical-tube-assembly-ota","provider":"Magnum Sports","version":"1.0","type":"link"}