Jon wrote:
If you don't turn the locking ring separately from the focussing ring, it'll turn forever and never lock. You need to turn just the locking ring. That'll turn as far as possible CW (from the camera) to lock, and CCW to unlock, but no further.
If you don't turn the locking ring separately from the focussing ring, it'll turn forever and never lock. You need to turn just the locking ring. That'll turn as far as possible CW (from the camera) to lock, and CCW to unlock, but no further.
You can also place it anywhere in between to allow for some friction to prevent zoom creep when pointing up or down.

