New Hejnar Photo Quick Release 10.00 inch multipurpose rail with 3 captive style slots. 5/8 (0.625) inch thick. Engraved metric scale for references. It is the best quick release system for tripods and monopods when combined with Arca style ball head and clamps. This plate is designed to work with variety of ARCA TYPE quick release system.
Rail can be used as:
Macro Rail
Lens Plate
Need to put more light through an umbrella in the studio MPR will do.
Long lens support, ( in combination with lens support bracket)