Vixen specifications ED S APO Refractors, Vixen ED 81S, ED103S and ED115S APOs

ED “S” APO

REFRACTORS

Vixen ED 81S, ED103S and ED115S APOs

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
Obj.	F.L. @ f/ratio		(backfocus)		OTA Dimensions	Finder, E.P. adapter, mounting
Diam.	"	with ED 0.67x		"	Length x Tube Diameter x Weight

ED81SWT OTA SX-Trim			TS-OR-2608
81mm	625mm @ f/7.7	(150mm)		Dot Finder
			600mm / 23.6" x 90mm x 2.3-kg / 5.1-lb	2" holder, 1¼" flip mirror w/T-threads
3.2"	419mm @ f/5.2	(100mm)
				tube rings/dovetail plate

ED103SWT OTA SX-Trim			TS-OR-2609
103mm	795mm @ f/7.7	(150mm)		7x50mm
			820mm / 32.3" x 115mm x 3.6-kg / 7.9-lb	2" holder, 1¼" flip mirror w/T-threads
4.1"	533mm @ f/5.2	(101.4mm)
				tube rings/dovetail plate

ED115SWT OTA SX-Trim			TS-OR-2616
115mm	890mm @ f/7.7	(150mm)		7x50mm
			940mm / 37" x 125mm x 4.4-kg / 9.7-lb	2" holder, 1¼" flip mirror w/T-threads
4.5"
	596mm @ f/5.2	(98.2mm)		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

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