Vixen ED81SWT 81mm Diameter Refractor Telescope with Coupled Altazimuth Porta Mount & Aluminum Legs

The ED "S" apochromatic refractor features Extra-Low Dispersion (ED) glass in its objective lens to suppress chromatic aberration to a virtually invisible level. 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.

ED81SWT SX-Trim on Porta Mount:
Telescope OTA comes coupled to the lightweight alt-az "Porta" mount. This is a highly portable system: because the weight of the scope is always over the mount, there is no need for heavy counterweights.

Standard Vixen dovetail mounting slot with lock and safety screw easily removes to reveal ¼-20 and M8-1.25 threaded holes for custom mounting solutions. Porta mount features switchable slow-motion knobs, tension adjustment hex key, disassembly hex key, built-in hex key storage bay, round tripod tray and aluminum legs that extend from 90cm to 130cm.