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10-23-2011, 10:17 AM   #1
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Stain Or Dust?

I'm pretty sure this is dust, but would like your opinions. it's almost at the very bottom of the screen dead center so you would probably never ever see it. As long as its dust I won't do anything with it till I use my free cleaning from the two year warranty. Please tell me its dust. The first image is at F22, the second at f16, you can't see at any other F stop. I can't get rid of it with a large rocket blower! Hardly ever change lenses, and when I do it's always indoors.

Last edited by Tony3d; 09-03-2015 at 06:18 PM.
10-23-2011, 10:31 AM   #2
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I would say dust of some sort but it looks like the type that may require a wet clean. Personally, unless it's really screwing up photos, I'd leave it be for the time being.

10-23-2011, 10:35 AM   #3
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You will never see it as it's at the bottom of the screen, and only shows up at stops smaller than F14. When I send the camera in for it's free inspections, I'll have it cleaned then.
10-23-2011, 11:25 AM   #4
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Looks like dust to me, and if that's all you have at those f stops you are doing pretty good.

10-23-2011, 11:41 AM   #5

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In the tools menu #4 select sensor cleaning. It lifts the mirror. I could see the dust that was showing up on my images. A quick blow solved the problem.
10-23-2011, 12:19 PM   #6
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I tried my large rocket blower, but it's still there. When I send it in for the free inspection from the extended warranty, I'll have them clean the sensor. Being almost at the bottom of the sensor, it will probably never show in my images.
10-23-2011, 10:32 PM   #7
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QuoteOriginally posted by derekkite Quote
A quick blow solved the problem.
No it won't, the way it presents in the picture; This is the sort of foreign matter that cannot be blown off. Wet clean is required, either with a sensor cleaning swab moistened lightly with distilled water and then wiped dry with a new swab or the same procedure instead of water use Ethanol.


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