I have a Pentax FA* 85mm f/1.4 with a slight problem, when the lens is used in manual focus and then swithched back to AF the AF will not work until the lens is removed and the drive coupling shaft rotated with a small screwdriver until a click can be heard.
Can anyone tell me if this is a common problem and how much it would cost to have rectified? Also any opinion on the optical performance would be appreciated as I haven't had chance to use the lens yet. Best regards, John
