Vixen ED 81S APO Refractor

Vixen ED 81S APO Refractor
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Model:  vixen_ED81SII
Part Number:  76082
Brand:  Vixen


NEW updated Mk-II model with enhanced correction of spherical aberration produces outstanding results for both visual and photographic applications. 

"The ED81SII was easy to set up and install on our Go-To mount and we found it a pleasure to use being so lightweight. It's easy to recommend it for both visual and imaging purposes."  Paul money writing for 'BBC Sky at Night' magazine April 2015. 

The Japanese-made Vixen ED81S APO refractor with a premium f7.7 doublet objective with extra low dispersion ED glass element offers images virtually free of chromatic aberration in all colours and edge-to-edge sharpness.

Fitted with a sturdy 2-inch dual-speed Rack & Pinion focuser. 

A Vixen 0.67x focal reducer is also available for imaging at f5.2

Vixen ED81S Optical Path (pdf)

Vixen ED81S Optical Path with Focal Reducer (pdf)



Objective lens 81mm ED doublet
Focal length (Focal ratio) 625mm (f7.7)
Resolving power, limiting magnitude 1.43 arc sec, 11.3
Light gathering power 134x
Tube size & weight (OD) 90mm x (L) 583mm, 2.3kg (5.1lb)
Finderscope Optional
Adapter thread / visual back 60mm on scope body. 42mm for T-mount, 31.7mm push-fit, 50.8mm* push fit on optional flip mirror
Accessories included Dovetail adapter, tube rings & 2" dual speed focuser
Photography** Prime focus, Eyepiece projection and afocal imaging

*A 50.8mm mirror diagonal or a 50.8mm extension tube is needed to use a 50.8mm eyepiece. **Optional photographic accessories are needed.



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