If this has been hashed out before, I apologize, but I did try to search the topic but only got ISO results
As an excited owner of a new 6D and got the 24-105 L with it I noticed a very noisy sound from the lens while keeping the shutter button half depressed (i.e. locing focus). I know this is the IS and even confirmed by switching it off and the noise goes away.
Now I understand that IS is actually a motorized movement of a lens group and thus expect a bit of a sound and all of my IS lenses does that, but this sounds suspiciously louder, louder even than my Sigma 17-50 F2.8 OS and that I did not expect.
Is this normal or should I take it back to the store? To describe the noise level is difficult, but it is noticebly louder than my 100L macro and as my Sigma