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Old Sep 7, 2007, 10:12 PM   #1
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OK, I got a good oportunity to come to Portland, Maine for work. There are some really awesome areas to take some pics.

While reviewing them I noticed some spots. So, I immediatly cleaned my lens, both sides of the filter and looked at the glass. NO issues or spots noticed. Took some more shots and they are still there. I cant really see the mirror good enough to see anything wrong. :?

Any suggestions??

I assume its in the camera since I have just started seeing this recently and cleaned the lens good.




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Old Sep 7, 2007, 10:17 PM   #2
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one more example
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Old Sep 7, 2007, 10:19 PM   #3
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Old Sep 7, 2007, 10:19 PM   #4
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Old Sep 7, 2007, 10:20 PM   #5
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wow just noticed this one.
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Old Sep 7, 2007, 10:35 PM   #6
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Redop,

It looks to me you have joined the exclusive club of Sensor Dust

It is a bit hard to tell, because of the size of the pics. Dust on the sensor happens when changing lenses. I would suggest if you do not already have one is to get a rocket blower. It is a hand pressure air blower. Follow the instructions for your camera for sensor cleaning. DO NOT USE COMPRESSED AIR!!!!

After blowing off the dust, take some test shots against a solid light colored background with an f stop as small as your lens will go. (you may need a tripod to do this) then Look at the images in the computer.

If this does not work there are several wet sensor cleaning kits on the market. I would research them on the internet and pick one that works for you. If this makes you a little nervous, you can always send it to canon and have them do it.

I hope this helps, I'm sure someone out there can explain it better:?

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Old Sep 10, 2007, 2:57 AM   #7
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Yup you have muck on your sensor. Give it a clean.
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Old Sep 12, 2007, 4:28 PM   #8
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In the mean time, before you clean the sensor, try usinga larger aperture (smaller f number), and those spots will probably dissappear.

Your EXIF data says you were using f18, 1/800, and ISO 640 on one of the photos:



You should change the ISO to 100 or 200 and use about f8.
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Old Sep 17, 2007, 10:39 PM   #9
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Ok, now I am confused. I have been taking photos with my other two lenses and I dont see any spots. Can someone explain why this may be?



The other two lenses are:

Sigma 100-300mm f4 & Sigma 18-50mm f2.8
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Old Sep 18, 2007, 2:46 AM   #10
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Simply that you have had a wider aperture on those shots, nothing to do with which lens you are using.

It is only when stopped down that you will notice the crud.
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