Canon B4 lens mount

Last crawled date: 6 years, 2 months ago

A 3D printed mount for Canon B4 lenses that goes roughly on the centre of gravity of the lens with a small DSLR attached. It's much less prone to wobble than when supported by the lens adapter (or worse, just the camera!). It uses M3 screw threads on the lens, originally placed for Canon remote focus and iris gears. Tested and work on J9ax5.2B4 IRS & J15ax8B4 IAS lenses, but should work for other Canon B3/B4/c-mount lenses with a similar 38mm between front and back screws where included.
Tripod screw thread is 1/4" UNC (1/4" BSW).
Requires 4 off M3 x 6mm-8mm screws front & rear. (or you can use longer screws with appropriate thickness washers; screws must not protrude into lens more than 4mm -or you will feel it locking the zoom and aperture rings).