Aluminium Alloy Material: Made of anodizing aluminium; precision machined solid aluminum finder shoe base in matte black; for almost all viewfinder holders; for Witty 1 Tangent attachment etc; fits all lens barrel radii
Easy to Install: Two large knurled thumbscrews makes it easy to install; bases feature two large thumbscrew locks to secure finder scope or reflex sight in place; even while wearing gloves; just put it on 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
Adjustment of finder scope alignment via two screws and spring; requires L1131F battery not inclueded for illuminator operation;
9x50 finder scope with 50mm objective lens diameter; brighter DSOs directly visible;