the 1/4-20 setscrew clamps against the 1.5" cylinder sticking out from the plate
File: _MG_1322.JPG File size: 1,689KB Image Serial Number: 000-1322 Camera Model: Canon EOS 20D Firmware: Digital Photo Professional Date/Time: 2008:02:02 22:44:12 Shutter speed: 1/60 sec Aperture: 4.5 Exposure mode: Av Exposure compensation: +1/3 Flash: Off ISO: 200 Focal length: 50mm Image size: 3504 x 2336 Rotation: none Color space: sRGB Color profile: sRGB v1.31 (Canon) User comments: "the 1/4-20 setscrew clamps against the 1.5" cylinder sticking out from the plate"
