Canon RF 16mm f2.8 STM parts and features a standard Arca-type

and features a standard Arca-type quick release system (one plate is included)

but it's 720P and not very good

The Neewer 85mm f1

5 lens is a compact and unusually fast short telephoto lens for Pentax K-mount SLR cameras

The Finney 70mm f200 Pinhole is a professionally manufactured pinhole lens for Mamiya 645 cameras

Canon RF 16mm f2.8 STM parts and features a standard Arca-typeThe Canon RF 16mm f2. 8 STM is a remarkably small full frame ultrawide lens, no larger than a standard 50mm lens but with a much, much wider field of view and a very respectable f2. 8 aperture. In excellent condition, with clean glass and only very minor cosmetic wear.