Hey gang...i am looking to buy this lens off of somebody and have tested the lens but have a bit of hesitation based on the noise of the stabilizer. Is it the copy I am testing or is normal for this lens to make a rather clunky off/on when the stabilizer is activating/deactivating? I have the Canon 70-200 f4 IS which is a bit noisy. This one seems just a bit louder than that one. I have tried searching for info but haven't come up with any solid definitive conclusions. Figured I'd come here to a trusted forum of users to confirm. Thanks in advance!