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04-14-2014, 07:13 PM   #1
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k-r lock up under specific condition

Hi,

I have 3 lenses, two of them are digital and no problem. However, with my manual Asahi Pentax Macro F4 100mm lens it will lock up sometimes under this condition: I push the green button to get the camera to set the shutter speed and 'sometimes' it makes a double mirror flap sound and 'sometimes' after that when I push the button to take a photo it will simply lock the mirror up.

I can put my ear up to the camera and hear a faint sizzling noise inside. The only way to get the camera back is to take the battery out and put it back in - then immediately the camera releases the mirror back down.

My camera is out of warranty and I don't think it's economical to have it repaired. As long as it only does this occasionally I can live with it, but I do wonder what it is about the manual lens that causes this.

Additional info: firmware is up to date. Occurs with both my lithium batteries - haven't tried AA batteries. I have considered just manually selecting my shutter speed to completely avoid this.


Last edited by Michael Piziak; 04-14-2014 at 07:18 PM.
04-17-2014, 01:32 PM   #2
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The same happens to me a 50mm 1.4f. my goal is metallic body and I think that might make connection with pins. Yours is also metal? to see if anyone can help. Once "hooked" every time I give to shoot up and down the mirror without photography, sometimes even freezes up and down constantly.
04-29-2014, 11:27 PM - 1 Like   #3
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stop using lens causing this, you will kill your camera. read my comment on this thread https://www.pentaxforums.com/forums/116-pentax-k-r/245179-mirror-flop-shutter...ibrations.html
05-01-2014, 05:28 PM   #4
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QuoteOriginally posted by leamlr Quote
The same happens to me a 50mm 1.4f. my goal is metallic body and I think that might make connection with pins. Yours is also metal? to see if anyone can help. Once "hooked" every time I give to shoot up and down the mirror without photography, sometimes even freezes up and down constantly.
What do you mean by "my goal is metallic body and I think that might make connection with pins." ?

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