Vixen ED103S OTA
The newly designed high definition ED lens on the Vixen ED103S gives excellent optical performance with a short optical tube for easy handling. The new ED lenses feature brighter images from the shorter f/7.7 focal ratio and capture crisp, pinpoint star images for your eye's enjoyment. The new ED glass produces clear and high contrast viewing, virtually free of false color. The design on the Vixen ED103S uses newly developed, environmentally friendly glass technology, free of hazardous lead that helps to support a cleaner global environment.
Manufacturer Product Number:2609SP
The optics of this scope are simply superb -- truly apo even if a doublet. Stars are pinpoint, and I have yet to see a trace of chromatic aberration. Mechanically, the build is very solid, and the rack-and-pinon focuser smooth. The ED103S was also packaged with a high-quality, very stable 7x50 finderscope and a flip-mirror diagonal. I give it 4 stars rather than 5 only because the focuser is single-speed (an odd choice by ***** on a high-end refractor in this day and age). Since I use the scope only for visual observation, the flip-mirror diagonal is awkward, and I immediately replaced it with a standard star diagonal. The ED103S is being replaced by the SD103S, somewhat better tailored for photography, but as I hear with the same optics.