>The trigger to release the shutter is electronic, I just >need to send +5v to one pin to focus, +5v to another pin >to trigger the shutter (the camera is a Canon EOS 10D). OK, where did you find this info? having a couple of film based EOS units myself, am interested in any info, pinouts etc, you can point me at. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.