the best way to test for dust is to put on a normal lens, stop down to min aperature, eg F22, point camera at white (or at least evenly coloured) wall, or the blue sky, take a pic (flash or ambient light doesnt matter), with such a small aperature ANY dust particles will show up like a sore thumb, its the ultimate acid test for sensor dust.
Scott
Hi all,
Although it's good practice to maintain clean optics, it's not always possible to have them spotless and not a good idea to continually clean them. In my opinion, once a year would be extreme for internal camera optics, though using a blower only can be done as often as you want.
It doesn't usually go over well for some reason , but the practise of flat fielding exists valid reasons and the removal of inevitable dust spots from images is one of them.
, but the practise of flat fielding exists valid reasons and the removal of inevitable dust spots from images is one of them.
