Hi all, Haven't been here for a while, but I have a question: Recently I've been reading up on cleaning sensors (I know it's not really the sensor which is cleaned). I bought a sensor swab and some Eclipse E2 last week. Now I wonder at which stage I should clean the sensor. I have my camera for about 9 months now and haven't done anything else than use the rocket air blower twice. I always try to change lenses as quickly as possible and put the covers on them quickly too. Here are some test pictures of the sky, would you think it's cleaning time when they look like this? I circled the worst dust in the f/45 picture and copied those circles to the other ones. These are all cropped to show a part of the picture at 100%. As you can see at f/8 the dust is not visible, while at f/16 you really have to look good to see them. Sky at f/45 Sky at f/22 Sky at f/16 Sky at f/8 Thanks in advance!