Hello I just bought a second hand 75-300mm ii and noticed that the AF isn't as quiet as my 17mm f1.8. I'm wondering if this is normal as I can clearly hear it from the tele during video even outside. I guess I expected it to be more quite with the MSC motor. Also when I have it in burst mode and IS on the camera seems to make a strange whining sound especially if I move it around much. Seems like the IBIS is still trying to control the sensor while it's writing data to the sd card, this doesn't happen in single mode. When powering off it seems to make a low pitched clunking sound as well, I'm guessing this is from the elements going back to a resting position. I bought the EP5 kit a couple months back and it's new. Just curious if any else has experienced this or if I got a poor copy of the 75-300mm.