i have a 100 400 L lense, among others.
i have been having problems with dust in my eos 1d mk2 (you could not see the picture for the dust). i once had to paint out over 200 of the blighters because the picture was for publication. Sent back to canon twice in two months for cleaning, she is only five months old and the camera was delivered with dust spots!!!!!!
I asked canon how this could be seeing as i only use it maybe twice a week and i am extremely careful on lense changes.
I have told them that i have a small amount of play on the mount when the lense is connected and also i can move it away from the body maybe the width of a piece of paper (only on very close inspection though).
all of you with 100 400,s try it to see if you can do it to.
This i am certain wil not only allow dust in but also wreck the ability of the camera to accurately focus. I have read that this play was normal, but having now recieved the 400d and connected the 100 400 lense to it i see that it is not normal. The 400d is rock solid. no play at all.
They have responded saying that it sounds as if the lense mount is faulty and the guy i spoke to in the tech department was audibly shocked when i told him the problem. "its loose!", "it actually moves!" were his words. he told me to send it back to them straight away.
If canon give it back to me in the same condition then i have told them i will demand a refund. i am not paying this money for supposed high quality camera body with a faulty lense mount!!!! After all everything else on the camera is precision engineered.it is like saying that a ferrari is supposed to have a knocking sound on the front right wheel. i dont care, i dont like it and it does not fill me with confidence.
Has anyone heard this response from canon about dust on sensors and has anyone had a lense mount replaced on an eos 1d mk2 and did it solve the problem?
thanks for your time and any answers.