Originally posted by willis Just bought the Pentax 18-250 today and I was wondering about the manual focus ring...it does not turn smoothly at all. It "catches" at each focal length. Is this the way it is supposed to be or is there something that I am doing wrong??? Thanks in advance.
The 18-250mm does not feature quick-shift focus. If you want to focus manually you'll have to turn the switch on the camera to MF.
If you've already done this and the focus ring is still not smooth, then I would say you have a defective unit. Does it also turn with difficulty when it's off the camera?