PentaxForums.com - View Single Post - Don't update to the 1.01 firmware! It breaks autofocus

*davef* · 06-17-2008, 05:57 AM

I don't have the 16-50 so can't comment but my lenses work fine. Have you tried cleaning the mount contacts on the lens and the body and then reseating the lens? 1.01 does appear to "break" Bibble. Dave

Originally Posted by jms698

I just updated my Pentax K20d to the 1.01 firmware. However, now my 16-50mm f/2.8 lens no longer focuses. It makes a loud noise whirring noise and hunts to either end of the focus range. It sounds like it is trying to even force the lens to focus past the extremes of the focus range with the motor grinding when it reaches the end of the focus range. After hunting like this for a few seconds it gives up, failing to focus properly. This occurs in all lighting conditions. Previous to installing the new firmware there was no problem and the lens focused perfectly.

I wonder if there is a way to downgrade back to the 1.0 firmware?

In any case, I would suggest everyone hold off upgrading to the new firmware. It obviously hasn't been tested properly.

06-17-2008, 05:57 AM	#8
davef Site Supporter Location: Ontario Gallery Photos: 0 Posts: 366	I don't have the 16-50 so can't comment but my lenses work fine. Have you tried cleaning the mount contacts on the lens and the body and then reseating the lens? 1.01 does appear to "break" Bibble. Dave Originally Posted by jms698 I just updated my Pentax K20d to the 1.01 firmware. However, now my 16-50mm f/2.8 lens no longer focuses. It makes a loud noise whirring noise and hunts to either end of the focus range. It sounds like it is trying to even force the lens to focus past the extremes of the focus range with the motor grinding when it reaches the end of the focus range. After hunting like this for a few seconds it gives up, failing to focus properly. This occurs in all lighting conditions. Previous to installing the new firmware there was no problem and the lens focused perfectly. I wonder if there is a way to downgrade back to the 1.0 firmware? In any case, I would suggest everyone hold off upgrading to the new firmware. It obviously hasn't been tested properly.