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ED “S” APO
REFRACTORS
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Copyright © 2002-2004 Vixen North America, 32 Elkay Dr., Chester, NY 10918. All rights reserved.
Vixen ED 81S, ED103S and ED115S APO
s
These are Vixen's top-
line APO refractors: made in Japan with
new ED "eco-glass" (lead and arsenic free). These scopes
have faster focal ratios and a more compact length compared
to the prior ED 80S and ED 102S telescopes. In fact, the big
ED 115S is shorter than the old ED 102S! The new optics are
especially good at suppressing the dispersion of violet light —
this avoids halos and blooming around images of bright stars.
Coupled with a medium f/7.7 focal ratio, the ED “S” series
provide a sharp, color-free image of high contrast for both
visual and photographic applications. The big Vixen 60mm
drawtube means these refractors can handle the full line of
Vixen drawtube accessories. Vixen finishing touches include
standard flip-mirror, carry handle, and focus tension/lock.
Works great with any Vixen equatorial mount.
Telescope Specifications with and
without ED 0.67× Focal Reducer
Telescope Model # Accessories
F.L. @ f/ratio
(backfocus)
Obj.
Diam.
" with ED 0.67x "
OTA Dimensions
Length x Tube Diameter x Weight
Finder, E.P. adapter, mounting
ED81SWT OTA SX-Trim TS-OR-2608
625mm @ f/7.7
(150mm)
81mm
3.2"
419mm @ f/5.2
(100mm)
600mm / 23.6" x 90mm x 2.3-kg / 5.1-lb
Dot Finder
2" holder, 1¼" flip mirror w/T-threads
tube rings/dovetail plate
ED103SWT OTA SX-Trim TS-OR-2609
795mm @ f/7.7
(150mm)
103mm
4.1"
533mm @ f/5.2
(101.4mm)
820mm / 32.3" x 115mm x 3.6-kg / 7.9-lb
7x50mm
2" holder, 1¼" flip mirror w/T-threads
tube rings/dovetail plate
ED115SWT OTA SX-Trim TS-OR-2616
890mm @ f/7.7
(150mm)
115mm
4.5"
596mm @ f/5.2
(98.2mm)
940mm / 37" x 125mm x 4.4-kg / 9.7-lb
7x50mm
2" holder, 1¼" flip mirror w/T-threads
tube rings/dovetail plate
Review of Vixen ED 103S (without reducer)
The Moon was sharp with no color at all. The contrast was great with Plato and the Alpine
Valley showing a wealth of detail as did Copernicus. Out of curiosity, I set the zoom at the
8mm setting and inserted it in a 3x Barlow (that's almost 300x) with no image breakdown on
the Moon and I actually felt I could have gone higher.
— Johnson, Pernel. "Vixen ED103SWT Apochromatic" Astromart.com Reviews. Dec. 15, 2005