I have a Hahnel Pro wireless remote.
I wonder if it is compatible with the 7D.
I was using it recently , on Av,with shutter speed 640, f8 and Isdo 400.
The above were ok when I pressed the shutter manually.
When I used the remote, it triggered ok but when I looked at the shots later they were very underexposed - the shutter speed had shot up to 1000,800,4000,5000 etc
When I had it on Av, shutter speed 100, f14, iso 400 it again was ok when I pressed the shutter.
Using the remote I got shutter speeds varying from 640 to 1250.
Any idea what is going on?