Hi, I have built a camera controller and I am having issues with activating bulb mode on the camera. Normal shutter activation works OK. The controller should follow the following process; open shutter, wait for a sensor to trigger, activate flash, close shutter. I have this working with a timed…

Problem with activating bulb mode on Canon 40D

MartynC May 24, 2014, 2:03pm 3

DOH!

Added the second opto. Now working like a charm. Thank you very very much.