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08-02-2012, 08:14 AM   #46
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FWIW, I got my camera back from CRIS and this was on the work order:

CHECKED FOR LOCKUP. MEMORY BUFFERING

But no associated fixes, so I guess they didn't find anything. I don't know if this means that they know what the issue is and it was related to buffering, or if they're just writing it out like that because of how I described it.

08-03-2012, 08:57 AM   #47
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Have same problem: completely lock up k5/Av/55-300/liveview off/no battery grip/AF.S/ battery level about 90%/ while focusing , twice in a day. Works perfectly with primes. K5 is brand new and I already had sensor replaced and now this
Snr; 4332...
08-03-2012, 03:22 PM   #48
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Does it only lock up in Av or other auto modes as well?
08-04-2012, 03:38 AM   #49
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Twice in Av . Give me a few weeks and I will know if its just Av

09-15-2012, 10:29 AM   #50
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I had three lockups during New York Fashion Week shooting major runway shows. Really the most terrible times to have a camera failure, I missed several looks. Three times with a 50-135 f2.8, once with the 200mm f2.8, ISO 400 on one show and ISO 800 on the other, lots of autofocus usage and rapid shooting, 16MP JPEG ***, firmware v 1.13, and I do not use noise reduction.

Last edited by cb11211; 09-15-2012 at 10:36 AM.
09-15-2012, 11:14 AM   #51
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FWIW, I don't know if they actually did anything to my camera at CRIS, but I haven't had a lockup in over 3000 shots including lots of action shots. I also switched to a Sandisk Extreme memory card, not sure if that's a factor.
09-15-2012, 04:52 PM   #52
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update to last post -k5 lock up-
well it came back from pentax uk end of july mirror box motor replaced. as for lock up marked on repair note as buffering faught ha ha
well used the k5 for two days and- more lock ups then mirror locks up and did not fall even with battery removed sent back for repair
yet again. came back a few days ago, yet again a new mirror box motor and buffering faught reason for locking up, well it wont be doing that
again not to me anyway i part exchanged for a nikon i need a camera i can trust and sorry to say the k5 is not it,i will keep looking at
this site to see when the upgraded k5 hits thr streets in a few days time how long it will take for that to fall apart not long????
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