Help with spots

[Mike Butcher]

Hi everyone,
I need some help on this one.
I have been using my new 10d for just over a week now...good results except for shots on solid backgrounds...I get strange spots on the images, I thought it was the lense (canon 28mm-135mm Image stabilizer), which I promptly replaced with a new one, but I am still getting the same spots in the exact same area...the only catch is: the spot change focus as I focus out...ie. really noticable at 28mm range, somewhat noticable at 41mm range (would this eliminate the possibility of it being dust on the sensor?)
Is this a flaw in this brand of lense?

You can check out samples here:
http://www.see-spot-jump.com/what-is-this.html
The first pic was taken with the original lense at 28mm.
The second pic was taken with the replacement lense at 41mm.
When I overlay the images in photoshop they line up exactly...and it's not just located in one area, the spots end up distributed throughout the image.

Any help would be much appreciated...

[ultimateimagery]

Hi there,

I too have had these spots, not in the same places, but the same idea. It is dust on your sensor, or on the mirror - but mostlikely the sensor. Fully charge your batteries, and perform a sensor clean. Every time I change lens, I get this. Not a lens changes goes by without getting these spots. I do my very best to replace lens in dust free environments but no matter what I do, I seem to get dust on the sensor.

Hope this helps.

[Rob Larsen]

There is a good article on sensor cleaning at http://www.pbase.com/copperhill/ccd_cleaning

[martcol]

I'd say those spots are definately dust on the sensor. I have had limited success at cleaning my sensor as has Canon! Sometimes I've managed to do little more than move the dust around and on occaisions made it worse!

I have now learned to live with dust and will only clean it if I have to. What will make a difference to how noticable it is (apart from the background) is the f-stop.

Martin