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07-10-2015, 07:27 AM   #16
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Join Date: Mar 2015
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So far, I only use 90MB/s high-speed SD card from SANDISK for my PENTAX 645Z.

Never experienced any freezing.

07-10-2015, 08:06 AM   #17
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Join Date: Jan 2015
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I get freezing quite a bit, well, not so much freezing but the camera refuses to AF unless I pull the battery or wiggle the lens in the mount. Usually happens when I'm shooting a lot in a short space of time so I'm trying my best to investigate what leads to the error and that I'm not just going faster than the camera can keep up with.

Update, happened again yesterday, buffer was empty, and it was with the 150mm - Wiggled the lens in the mount and it was fine again.

Last edited by Chris Giles; 07-13-2015 at 03:41 AM.
07-05-2016, 05:13 AM   #18
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Location: Morocco
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Pentax 645z freeze

Hi Chris

I've had the same with my month old camera. Did you find out any more on this?

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