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Old Oct 15, 2006, 6:23 PM   #1
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My husband was happily shooting Mama Carolina wren in the distance with his Tokina 80-400 without a problem when, as usual, the wretched autofocus hunted and hunted and hunted some more, and then suddenly spluttered and died. He thought it was the batteries as the whole entire LED seemed to have died with it. He put in new batteries and all was well except the autofocus mechanism was dead as a doornail. We tested it with the DA 50-200 and it was dead as well.

Any suggestions? We bought the camera in August so it should still be under warranty, but we're two very sad people, having just repaired the aforesaid lens, and a Canon A700 before that (grit of sand in the lens).

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Old Oct 15, 2006, 7:46 PM   #2
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if the AF is gone then you will have to send it in. be happy that it is in warranty

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Old Oct 15, 2006, 10:17 PM   #3
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i didnt know this was possible. can you actually kill your autofocus by letting it hunt for too long??? sorry to hear about your situation but now i'm paranoid about letting my ds search for a focus point. does this happen often? :sad:
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Old Oct 16, 2006, 6:26 AM   #4
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Probably the AF motor was overloaded and burnt out. It needs a replacement. Since you have a K100D, it should be under warranty, but then since you burnt the motor with a non-Pentax lens, I don't know if Pentax will repair it for free.. It might costly to repair.

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Old Oct 16, 2006, 8:29 AM   #5
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are you sure your husband didn't set the "OK-button while shooting" to "enable AF" in the custom settings of the camera? If you do that half pressing the shutter won't do anything, set the ok button to somthing else.

And although I'm sure this'll sound stupid (but you never know...), is the AF/MF switch set to AF?
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