Don't update to the 1.01 firmware! It breaks autofocus

Started Jun 17, 2008 | Discussions thread
AdamT Forum Pro • Posts: 60,844
Re: Why? the motor is TURNING ..

But the OP told that the lens makes "a loud noise whirring noise".
That sounds just like a SDM lens that utilizes the body's screw focus
motor instead of the SDM focus motor.

Very Good point -- Those Powerzoom terminals seem to be more trouble than SDM is worth, Pentax should have added power terminals to the mount for SDM Like Nikon and KM did rather than use those flakey connectors! - the thing should still lock focus though even with the screw drive

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