Use the black Alpine Astronomical Baader Stronghold Tangent Mount Assembly to easily attach finders or camera lenses onto your optical tube assembly (OTA). The bottom of the assembly has 1/4"-20 and 3/8"-16 photo threads, and four each of M6 and M5 threaded holes to enable it to be mounted onto your OTA or cradle rings. The top of the assembly has a small Vixen dovetail saddle clamp, 1/4"-20 threaded screw, and M6 threaded holes to mount finders or lenses up to 15 pounds. The assembly adjusts on two axes for precise alignment with the OTA.