ED81SII, ED103S, ED115S
Discontinued September 2017
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.
75865 ED103S
The newly designed ED lens in Vixen's ED103S gives excellent optical performance in a short optical tube for easy handling.
75866 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.
