Just got a D600 and fired off 500 jpgs at both ends doing the f/22 light cream white wall test, it's not exactly blue sky where I live right now, and found what may be some dust spots scattered about and 1 dark black blotch at the lower bottom only on the second test. The spots seem very, very, circular.
I also ordered the Artic Butterfly sensor cleaning kit and want to give it the full gamut go. I've seen numerous youtubes and posts on how to do it and except for experience I think I have that part down. However I live, feeling lucky, in a house just built this January and no matter which room I try there seems to be fine bits of dust floating all through the air. The only way I know that is when I turn all the lights in a room off and shine a spotlight then I can see the dust all around.
It seems it would be a fruitless exercise trying to give a good cleaning in such an environment. Does everybody else have clean rooms and if not what are your suggestions.
If I can clean this D600 myself I don't plan on sending it back.
I think we're being a wee bit obsessive about this issue.
There will always be dust in the air. But, to minimize the chances, don't clean near any source of draft, like a forced air heating duct. I suppose a room like a seldom used guest bedroom might have less stirred up dust than actively used rooms.
I meant this as a reply to the OP, not Joseph. However, Joseph, do you really think it's a good idea to open up a camera in a steamy bathroom? I wouldn't.
Turn the lights on! Don't do it in the dark! Not really making fun, but I used to work in pharmaceuticals where certain things had to be packed/worked with under clean conditions with special HVAC concerns and people specially suited. Guess what? There's still dust floating around, like it or not. A highkly skilled watchmaker once asked me why he had dust in watches that had been air-tight sealed for decades. There is an answer.... Clean your camera and don't worry about the dust that you see with the 'torch'.
============================================== Darrell Young (DigitalDarrell) www.pictureandpen.com "Better too many words than not enough understanding." ==============================================