This is a question on the workings more than anything, for a Canon 650D.

I was attempting to do some night photography over the Easter weekend, and set up my 650D on the tripod. I set mirror lock to enable and attached the cabled shutter release.

using live view mode to focus, and zoom focus in manual..

when I press the shutter release I notice the actual composition change in the live view...

As I press the shutter button (on the cable release) the camera view actually seems to move up and left.

I presume this is while the mirror is being locked in place, but I wanted to know if this is normal?

Is there something wrong with my camera?

Thanks in advance