Astromania Universal Quick Release Finder Shoe Base for Schmidt Cassegrains and Other Telescope 130-400mm Diameter - Bundle with - Dual Finder Mounting Bracket
Allows use of two finders with no drilling required; the material is alumina with excellent tactility
Great for both visual observers and astrophotographers
Use any combination of two aiming devices you wish including finder scope; red dot reflex sights; green laser pointer brackets; mini guide scopes; and more
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