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Old Aug 29, 2010, 12:40 AM   #1
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Default K20D locking up. LCD showing. F--

Today while shooting my local motocross, my K20D was locking up.

Things started good. But around 2 hours in. My camera started to lock up.

When it did, in the LCD panel it only showed F-- in the F setting box. The shutter button would not work, just locked up. To fix it i had to turn my mode dial, hit the green button or turn it off and back on. Once nothing would work, so i had to give it wack, hit the side of the camera.

It was random. Sometimes after only a few shots, other's after 20 to 50 shots. Did this all day.

Got the poos with it and came home. Since i've been home i've been playing with my camera, but it wont lock up again.

Anyone heard of this happening. Or know why it might do this...
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Old Aug 29, 2010, 1:22 AM   #2
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This usually means the camera is not reading the lens info correctly. Could be due to dirty contacts between the lens and camera, or the aperture ring moved off the 'A' setting. Possible problem with the cable connections inside the lens. Sometimes, if a lens is not completely locked into position when you change lenses, it can happen.
If the problem is always with one lens and not others, it's probably the lens.

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Old Aug 29, 2010, 4:02 AM   #3
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Thanks for the info Brian.

Was with my sigma 70-200 F2.8 lens. Has never done it before.

It was alittle dusty today. But i didn't change the lens.

I've just finished a good clean job on the camera. So hopefuly it wont happen again.
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Old Aug 29, 2010, 2:53 PM   #4
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I have also heard that some Sigma lenses have had issues, but I'm not sure what, or which lenses. You might check with Sigma to see if there is an upgrade to the lens. IIRC, you would have to send it out to be re-chipped it it is one that has the problem.

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Old Aug 29, 2010, 7:08 PM   #5
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Hmmm... Craig, I have to agree with Brian on the most likely cause. I've had similar problem with one of my Tamron lenses but, I think that is an adapter problem. The 70-200 f:2.8 is a great lens, do you have the one with HSM?
A couple times I had my K-10 camera act up like that after a couple hours in the hot humid weather here, then be OK after it cooled down. That camera went back and now I have the K-20 and so far so good. Hope you get yours figured out OK. Like Brian mentioned, make sure the contacts are clean and making good contact.
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Old Aug 29, 2010, 9:19 PM   #6
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Your problem sounds different than what I experienced - for me the aperature ring had slipped off the "A" position. Result was the same as yours - F-- on the screen.
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Old Aug 30, 2010, 1:31 AM   #7
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Lens is, (from the box.) 70-200mm F2.8 II APO EX DG Macro.

Is a great lens and camera. Have a K10D also. (First time it's ever done this though.) It was humid and dusty on the day. But so have other days in the past.

Have given everything a good clean. Been playing with it most of today. No trouble. Hopefuly it was just alittle dirt on the contacts, and all will stay good.

Thanks for all the help/advice..
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Old Aug 30, 2010, 4:21 AM   #8
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My Sigma 70-300 APO DG Macro lens does this occasionally on my K-7, it was fine on the K10D.
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