On 08/02/2012 15:30, William Sommerwerck wrote:
You can't ignore the screeching noise. It's screeching for a reason. I'd
start by trying to track down the cause.

Do you have an ultrasonic microphone?


Unfortunately not. What I am at a loss to explain at the moment is why
it can move through that position when starting up but not after focussing.

Andrew