Astromania Universal Quick Release Finder Shoe Base for Schmidt Cassegrains and Other Telescope 130-400mm Diameter - Bundle with - Finderscope Starpointer&Dovetail Mounting Base
A small red LED dot is projected onto a non magnifying viewing window so you can aim the main telescope quickly and easily
Thumbwheels allow positioning of the red dot horizontally and vertically for precise telescope alignment
Fits any diameter telescope tube except Schmidt-Cassegrain telescope optical tubes; the base is made of die-cast metal and features a large thumbscrew lock; includes two M4 screws
Easy to Install: Two large knurled thumbscrews makes it easy to install; Bases feature two large thumbscrew locks to secure your finder scope or reflex sight in place; even while wearing gloves; just put it on the optical tube and tighten the screws
Multi-Function: there are two elongated holes on this base and a single countersunk hole for screws up to M5 in the middle; two screws are on the side of base; the distance between the center points of the screw holes is 24 to 41 mm