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08-17-2014, 04:43 PM   #1
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Are these splotches or dust or stains or what?

Lately these large blobs have been appearing in my photos:



Are these sensor stains? Every picture I've seen on here of sensor stains look like much smaller dots. I've used the internal cleaning software but it hasn't done anything. They show up more when I'm zoomed in on my Sigma 17-70. Could it be on the glass inside the lens?

Any advice from those in the know?

08-17-2014, 04:55 PM   #2
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Can't see your image but can almost guarantee they are dust on the sensor -- they will get smaller as you stop down...
08-17-2014, 04:56 PM   #3
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The photo link isn't working
08-17-2014, 04:57 PM   #4
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Answered in duplicate thread :-)

It's dust. Use a rocket blower.

Nothing on the front or rear of a lens will show this detail.

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