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07-30-2015, 09:55 PM   #1
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Question about K20D

So...i've owned the K20d for about 6 ish years. I've started getting dots in some of my pics.....it doesn't seam to be lens related. I just got a lens back from Tamron that was completely rebuilt and it did the same thing. Almost perfect circles.

This is my first DSLR.... am i missing out on some maintenance on my camera...or is there an issue bubbling ?

07-30-2015, 10:06 PM   #2
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Post a photo. Could be dust on the sensor or dead pixels on the sensor.
07-30-2015, 10:10 PM - 1 Like   #3
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QuoteOriginally posted by kentster Quote
So...i've owned the K20d for about 6 ish years. I've started getting dots in some of my pics.....it doesn't seam to be lens related. I just got a lens back from Tamron that was completely rebuilt and it did the same thing. Almost perfect circles.

This is my first DSLR.... am i missing out on some maintenance on my camera...or is there an issue bubbling ?
Most likely dust on the sensor. After 6 years you probably have a lot of dust, but only the largest specks will be visible unless you choose a very small aperture.

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07-30-2015, 11:50 PM   #4
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Close down to f/22 or f/32, shoot a white wall/ceiling with base iso and long shutter speed, blur is irrelevant so move your camera as to eliminate detail in the picture.
Dark spots and hair-like marks are dust and hairs on your sensor.

07-31-2015, 08:16 AM   #5
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I find shooting a clear blue sky at F/22 to also be effective,walls have spots and defects that might show up.
07-31-2015, 09:37 AM   #6
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There is a dust mapping function in the custom menu. It shows you where your dust is.

Also, you could do pixel mapping, yuo might have some dead pixels which the camera can remove for you.
07-31-2015, 09:39 AM   #7
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QuoteOriginally posted by bdery Quote
There is a dust mapping function in the custom menu. It shows you where your dust is.

Also, you could do pixel mapping, yuo might have some dead pixels which the camera can remove for you.
what he said. ^
Pixel mapping is a wonderful thing on older cameras.
08-01-2015, 08:06 AM   #8
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QuoteOriginally posted by bschriver11 Quote
I find shooting a clear blue sky at F/22 to also be effective,walls have spots and defects that might show up.
Since I move the camera during the 3 or so seconds of the exposure, those defects don't show up at all.
A sky is also a viable alternative, but while you can count on your white wall, you can't count on clear blue skies every day of the year...

08-01-2015, 10:05 PM   #9
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i'll try the pixel mapping function...thank you
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