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05-25-2011, 02:59 PM   #1
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Join Date: May 2011
Location: Stockholm
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Pentax K10D + SIGMA 50mm F1.4 = Auto Focus problem (help?)


I really need help with this.
I just bought the SIGMA 50/1.4 EX DG HSM today and I can't get the auto focus to work!
I've tried switching both MF and AF along with AF on the lens, but it still doesn't work.

Are there any special settings/installations I should fix or what is it that I'm doing wrong?

I'm so excited about my new lens and I really want this to work, please help?



Oh, nevermind, just fixed it. I had to update the firmwire!

Last edited by casanova; 05-25-2011 at 03:31 PM. Reason: SOLVED!
05-25-2011, 03:28 PM   #2
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Join Date: Aug 2009
Location: New England
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What firmware version do you have on your K10D? The K10D did not ship with support for Pentax SDM. Sigma HSM is a similar focus technology, and a Pentax camera body needs to support SDM to support HSM. For the K10D, that means you need to have at least firmware 1.30 installed on your camera. The latest firmware is 1.31, and you can download it from here:

Latest K10D Firmware Update : Software Downloads : PENTAX

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