I've purchased three of them to use with my 1Ds3...none seem to fire the shutter.
The latest is this one http://www.bhphotovideo.com/c/produc...e_Shutter.html
In all cases, the lights on the units indicate power to the units
I shoot totally in manual mode, mostly using a 180 macro lens.
I'm beginning to think that the problem lies with the three-pin connection in the camera...is it probable?
Or might the problem be someplace else...where?