>Yet you've reported quite a number of problems with your gear >over the past year or so I think. I'm wondering if lens >changes without first turning off the camera might have >contributed to or caused some issues for you.
The problems were totally unrelated.
> >>As another poster here pointed out that more dust gets in >from >>zoom lenses than from charged CMOS. > >Perrone expressed an opinion of his. He never declared it as >proven fact because it is not. Some people who note excessive >dust on their camera sensors take upwards of a couple of >minutes to change lenses, but later declare that they always >change lenses quickly because that's their perception. Dust >can get in during long lens changes. I've seen people purse >their lips and blow dust from around a open lens mount on the >camera and then afterwards state absolutely that they would >never do such a thing because they simply did it without >thinking about it much less remembering afterward that they'd >done it.
Regardless what people say or speculate the fact that dust gets through the zoom lenses quicker (even primes but slower) in to the camera is a well known fact that people know for as long as interchangeable lenses been around. Take a look at your own lenses. There is dust in them. Mirror slap creates turbulence and dust migrates on your sensor and on the mirror and even on the prism. And if you have pump action lens it gets even worst.
> >>And I know that as soon as you disconnect the lens >electrical >>contacts become inactive. It is build in to every camera >>otherwise every one would have problems. > >Somebody might want to actually put a meter on the body mount >lens contacts to confirm that. Declaring it as fact without >some sort of actual proof might be a bit imprudent.
> >>Just think about it, >>if you clean the camera's sensor you need to remove the >lens >>while camera is on. Right? > >Wrong. Turn camera off. Remove lens. Turn camera on. Lock up >mirror for cleaning. Remount lens when finished cleaning. Turn >off camera. >
I have done it the first way always. So it is not wrong. It is just my choice. In fact I could say that your way is wrong because while lens is off and you are flipping the mirror extra dust gets in. And I am sure you are not doing it in a class A room.