Canon Angle Finder B (with Adapter S) replacement approximately 3800 actuations

approximately 3800 actuations

so I'm guessing that the "H" stands for "holes

71x is a Speed Booster designed specifically for the Blackmagic Pocket Cinema Camera 4K

The original Canonflex was introduced at about the same time as the original Nikon F

Canon Angle Finder B (with Adapter S) replacement approximately 3800 actuationsThe Canon Angle Finder B provides a potentially useful 90 degree angle on your Canon FD camera's viewfinder, great for low angle or copystand work. Not a magnifying finder: this one shows the full focusing screen. In excellent condition, with a threaded eyepiece (for cameras like the F 1) and a slip on adapter (for cameras like the AE 1 and similar). In excellent condition.