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Opticron Binoculars & Telescopes

ED81SII, ED103S, ED115S

Discontinued September 2017

ED81SII Review 76082 ED81SII
The new ED81SII is Vixen's updated version of the popular ED81S. With a new optical system that controls spherical aberration it produces outstanding sharp and high contrast images for both visual and photographic applications.

 

 

ED103S75865 ED103S
The newly designed ED lens in Vixen's ED103S gives excellent optical performance in a short optical tube for easy handling.

 

ED115S75866 ED115S
The largest aperture model of the ED series yet still compact at 940mm long and weighing under 5kg making it suitable for portable observation set-ups.

 

All ED series scopes include dovetail plate (not shown)

 

The 60mm visual back on the ED range can accept either an optional extension tube or diagonal to accommodate 50.8mm (2”) eyepieces.

An optional metal carry handle can be attached to the tube rings.

Model ED81SII ED103S ED115S
Objective lens 81mm ED apochromatic, multi-coated 103mm ED apochromatic, multi-coated 115mm ED apochromatic, multi-coated
Focal length (Focal ratio) 625mm (f7.7) 795mm (f7.7) 890mm (f7.7)
Resolving power, limiting magnitude 1.43 arc sec., 11.3 1.13 arc sec., 11.8 1.01 arc sec., 12.1
Light gathering power 134x 134x 270x
Tube size & weight (OD) 90mm x (L) 585mm, 3.6kg (7.92lb) (OD) 115mm x (L) 810mm, 5.4kg (11.89lb) (OD) 125mm x (L) 930mm, 6.2kg (13.65lb)
Finderscope Optional Optional 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 60mm on scope body. 42mm for T-mount, 31.7mm push-fit, 50.8mm* push fit on optional flip mirror 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 & dual speed focuser Dovetail adapter, tube rings & dual speed focuser Dovetail adapter, tube rings & dual speed focuser
Photography** Prime focus, eyepiece projection and afocal imaging Prime focus, eyepiece projection and afocal imaging 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.