guts wrote:
With camera on tripod and I focus on a certain spot and continue to hold the shutter release the focus spot drifts down, it's a 100x400L lens,I put a level on the lens and it is not moving and can hear the lens(or something) making noise like it's still trying to focus,Is the normal,Also using a remote shutter release cord,I hope ya'll can understand all of this.7D.
So it's the focus spot in the viewfinder that is drifting down? Is it a steady drop from center to bottom?