This is the standard Synta type dovetail for finderscopes. Add this to our standard R50 - R80 rings (the ones that have a square shaped bar between them) and convert your rings to a low-profile dovetail system. The dovetail attaches to the squared-shaped bar using two 5mm screws. This dovetail has the two threaded 5 mm holes for this mounting. It also has a 1/4-20 threaded hole in the center. Using this hole, the user can mount the finder and rings to a standard camera tripod.
