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Hi Craig
My Meade 80mm refractor Crayford focuser works the way Chris has described. I was in the habit of locking the focuser when I had achieved exact focus with my DSI II camera. Unfortunately, I found that the lock had a nasty habit of moving the focus just slightly but enough to spoil focus when the lock was clamped down. On close examination I found that the locking action moved the focuser barrel slightly in or out in a random fashion. I now only set the draw tension screw enough to stop the weight of the camera moving the barrel. Does anyone know how I can cure the
locking problem? Cheers Peter
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