| Re: USM Motor
Canon 70-200 IS and Canon 24-105 IS both L series.
I'm in a shed with a purpose cut slot. The lens does not protrude and is surrounded by camo netting. I'm sitting down and the camera is on a tripod, so the IS is not really needed.
I'm suspecting that some form of ultrasonic noise is the cause, so I'll be trying again Saturday with it off.
Thanks for the replies, I'll let you know how I get on. |