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08-21-2011, 01:35 AM   #1
Suella
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645d dust removal not working?

Can any 645d owners help with this?
I'm not sure the dust removal on my 645d is working. My K20d physically shook itself on start-up, whereas there is no noise or movement with my 645d (and yes I definitely have 'dust removal on start-up' selected in the menu). Is this normal on the 645d, or is mine faulty?
Thanks.

08-21-2011, 01:50 AM   #2
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QuoteOriginally posted by Suella Quote
Can any 645d owners help with this?
I'm not sure the dust removal on my 645d is working. My K20d physically shook itself on start-up, whereas there is no noise or movement with my 645d (and yes I definitely have 'dust removal on start-up' selected in the menu). Is this normal on the 645d, or is mine faulty?
Thanks.
If it's anything like the K5/K7, you won't here it. It's silent. Not the violent type shake of the K10/K20 cameras.

08-21-2011, 03:33 AM   #3
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Since the K-7 Pentax uses utrasonic movement of the sensor (or AA filter like Olympus first did, I don't know, moving the entire sensor seems a lot of mass).
You cannot hear the mechanism. However it is extremely more effective than the K10D, K20D shaking.

Bert
08-21-2011, 06:11 AM   #4
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The 645D uses the new ultrasonic system which is very, very faint compared to the K20D. You should be able to hear a brief sound on startup.


Adam
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08-21-2011, 04:54 PM   #5
Suella
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Jeff, Bert, Adam - Thanks very much for your replies. It seems my 645D is normal then. Having 'skipped' the K5 and K7, I wasn't aware of the new silent dust removal system!
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