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Anonymous
>>55022 Don't forget to power-wash out the residue
But seriously, http://www.luminous-landscape.com/essays/sensor-cleaning.shtml is a good place to start out.
To really see if there's dust, take a picture of a cloudless sky or a bright-lit sheet of clean paper at the smallest aperture your lens will go to (f/22 or higher if you can)
Now, take the image and import it into photoshop or similar.
In photoshop, auto-level the image (shift-ctrl-L). In corel photo-paint it's image->adjust->auto equalize.
This will show you dust (if any) and more importantly, where it is so you can clean.
Take a manual blower (I heard somewhere a foot-operated bellows pump like the kind you inflate rafts, etc with works well too, but I haven't tried it yet) and blow out the box first (where the mirror, viewfinder, etc is. Make sure you do that first (don't forget about the mount, someone said the brass shavings that scrape off the mount can make a sensor dirty again very quickly) or else all your cleaning will be worthless the next time you put your lens back on. Put your camera into mirror-lockup mode (in the menu as "clean ccd" or "clean cmos" or "cleaning mode"). Try to blow off the dust in the areas you saw in the picture.
Put the lens back on, take another test shot, level it, repeat if necessary. IF you can't get all the dust in say 3 tries, take it somewhere.
The best hint, and once I found this online I have not had to clean my sensor yet, is to NEVER change your lenses with the camera body facing upwards. Always point your camera to the ground and minimize the time the lens is off (always have a body cap or lens to go on the SECOND the lens is off).
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