|Quoting mx330 (Reply 8):|
I'm a bit nervous about touching the sensor myself. I'll have to think it twice.
You'll be nervous the first time you do it, but as long as you follow the instructions carefully, it's nothing difficult and certainly nothing to worry about. As long as you aren't rough, you'll not do any damage to the sensor. If there's one thing I hate, it's removing dust spots from photos so a quick sensor clean saves all the hassle. You'll wonder why you didn't do it before!
A quick way to look at how dirty your sensor is, point the camera at the sky or something uniform, stop the aperture down as small as you can, f/22 say, then take a photo. Don't worry if the shutter is too slow, this will show up any dust spots on the sensor clearly. I normally use a dust blower first and take a test shot. If the dust is still their, go in with a sensor swab then take another test shot and repeat until it's clean.
Equipment: 2x Canon EOS 50D; Sigma 10-20 EX DC HSM, 50-500 EX APO DG, Canon 24-105 f/4 L, Speedlite 430EX