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**akptc** · 09-02-2008, 09:41 PM

Howdy, I am hoping someone here has solved this problem.

My recently acquired Sigma 18-50mm F2.8 EX DC MACRO focuses perfectly on my K10D but not so on the K20D. I tried adjusting AF for this lens on the K20D but so far it's still work in progress.

Would anyone happen to know if there is perhaps a firmware update for this lens? I looked on the Sigma website but no luck yet. Any advice would be much appreciated.

alfdog · 09-04-2008, 07:58 AM

I got this lens when I had my k100ds.

I just received my k20d last week, and I haven't had any problems at all.

**akptc** · 09-04-2008, 08:48 AM

I ended up shipping the lens to a Sigma repair center, there was just no way to adjust it in-camera to focus correctly. It's real pity because I really like this lens. I will post an update on how it performs after the calibration.

k100d · 09-04-2008, 05:44 PM

Sigma repair center has a really good rep, hopefully it's fixed soon

09-02-2008, 09:41 PM	#1
akptc Site Supporter Join Date: Feb 2008 Location: USA Photos: Gallery Posts: 771	Sigma 18-50mm F2.8 EX DC MACRO AF problems on K20D Howdy, I am hoping someone here has solved this problem. My recently acquired Sigma 18-50mm F2.8 EX DC MACRO focuses perfectly on my K10D but not so on the K20D. I tried adjusting AF for this lens on the K20D but so far it's still work in progress. Would anyone happen to know if there is perhaps a firmware update for this lens? I looked on the Sigma website but no luck yet. Any advice would be much appreciated.

09-04-2008, 07:58 AM	#2
alfdog Senior Member Join Date: Aug 2008 Location: Michigan Posts: 176	hmm I got this lens when I had my k100ds. I just received my k20d last week, and I haven't had any problems at all.

09-04-2008, 08:48 AM	#3
akptc Site Supporter Join Date: Feb 2008 Location: USA Photos: Gallery Posts: 771 Original Poster	Update I ended up shipping the lens to a Sigma repair center, there was just no way to adjust it in-camera to focus correctly. It's real pity because I really like this lens. I will post an update on how it performs after the calibration.

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09-04-2008, 05:44 PM	#4
k100d Veteran Member Join Date: Feb 2008 Location: Toronto Posts: 3,911	Sigma repair center has a really good rep, hopefully it's fixed soon

Sigma 18-50mm F2.8 EX DC MACRO AF problems on K20D

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