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12-26-2009, 12:09 AM   #1
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Join Date: Aug 2009
Posts: 6
K20 , Sigma 24-135, and the menu

This is fairly weird, so I'm hoping someone else has run into this issue and found the fix/bypass/workaround.

I've noticed that the menu for settings on my K20D was acting like the four way button was screwed up; limited duration display of the menus (0-2 sec) was the norm with an occasional tantalizing almost get you to your item to change before the screen blanked out. I have tried different batteries, upgraded the firmware to 1.03, and it was still acting weird.

Then I took my Sigma 24-135 off the body. Hmmmmmmm. Now the settings displays stay on screen. Tried three other lenses. No problems . So I'm guessing it's something in the Sigma mount that's causing a problem . The camera shoots nice pictures and the play button works as it should.

I'm assuming it's a dirt issue first, then maybe a short. The lens clicks home on mounting and the issue does not occur on my K10D with this lens. Am I on the right track and where should I start the cleaning op , if so ?

12-26-2009, 05:17 AM   #2
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Join Date: Jan 2008
Location: NC
Posts: 787
when i had my sigma 24-135, it would cause my former *ist DL's menu to blank out.
i think this is a known issue with the sigma at least with the older pentax dslrs

no amount of cleaning the contacts helped.

12-26-2009, 06:39 AM   #3
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Join Date: Jul 2008
Location: Baltimore, Maryland
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One of the reviews here does mention an incompatibility issue.

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