Photo.net - Canon 10D Sensor Cleaning Guide
It has been quite a long time since I last posted some news about the Canon EOS 10D, with the recent release of the cheaper 300D over-shadowing its big brother. Anyway, Photo.net have published a guide to cleaning the sensor of the EOS 10D and other digital SLRs. Essential reading if you’re starting to get really annoyed by that dust that always appears in the same place, but you’re not quite sure what to do about it.
“If you don’t know if your sensor is clean and want to check, here is how to do it. Put a lens on your camera, set focus to infinity, set exposure compensation to +1, set the aperture to its smallest value (largest number), at least f22, f32 if you have it. Now hold the camera in front a uniformly illuminated target and take a shot. Look at the image. Do you see dark spots? If so you have dust. At wider apertures the dust specs will be much less visible. At f11 they may be very faint and at f8 or wider apertures they may be undetectable.”