What a difference a major clean makes;
I have been having focus issues for a while, all my shots were soft and I was starting to think the 7D was dying as it didn't matter which lens I used. Being an aged pensioner on a limited income a new camera was out of the question for a while' so after my annual Xmas trip to Melbourne I decided to give everything a thorough clean. So selecting the bathroom as the most dust free room in the house I proceeded starting with all my lenses and a couple of boxes of good lens wipes and a couple of cans of air duster, I started. First job was to wipe down each lens externally then clean the contacts with an eraser, then the outer lenses were given a good clean using lots of fresh lens wipes. I then turned to the camera firstly cleaning the exterior with the canned air and a good quality 20mm paint brush which had been washed in pure methanol then blown dry with canned air, the electrical contacts were then given a clean with contact cleaning fluid used sparingly I then concentrated on the sensor giving this a very wet clean using sensor cleaning fluid finishing off with sensor wipes, air and finally a static charged dry sensor brush. As it was a hot day everything dried quickly so I fitted my 17-50 F2.8 sigma and went out for a few test shots, the results are attached.

1 Before Clean
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2 After
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