some advice needed,dust or oil?

Started Jun 23, 2011 | Discussions thread
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henryshappy
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some advice needed,dust or oil?
Jun 23, 2011

I was taking some pics today in central london and decided to shoot the blue sky,as we dont get blue skys that often in the uk,lol.

At f22 and check the to see if anything was on the sensor,i found these 3 blotches,im not too worried as i never shoot at these kind of setting f22 or even f11, im always changing lens so im not too surprised if its dust,but im kinda hoping its not oil.The dust buster is turned on at all times and cleans the sensor when turned off,but does not seem to be moving these marks. many thanks for all advice and help given.. henry

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