This is a very high-quality quick-release finder bracket with two rings for 50mm finders. Each ring includes three-point screw adjustment for precisely aligning your finder. This bracket can be used with finder tubes 1.8" - 2.4" (46 - 60mm) in diameter. Black matte finish.
A dovetail base is included with this bracket. It has a base curve diameter of 9" (should directly fit most 8" SCTs). The base will need to be bolted on to your telescope tube (screws not included). The mounting-hole spacing on the base is 1.3". Made in Canada.