Whenever I leave my 5D MK III + Tamron 24-70 VC with VC turned on (even though the camera power is turned off), the battery drains very within a couple of days ... does anyone else face this issue?
I had a similar issue. Call Tamron, send it in, and they will fix it quickly. It needs an updated circuit board.
Thanks for the response, I was really hoping for your reply, as you are probably the biggest evangelist for Tamron 24-70 in CR (I say that with great respect for the excellent results you achieve with that lens) ... unfortunately, here in Qatar, we don't have any Tamron service center (for that matter any other service center that can fix lenses) ... also, I bought the Tamron 24-70 VC from Japan (through my boss), so if I want it fixed, I'll have to send it to Japan ... but I don't have time now, as I'm about to go on vacation for 15 days (to Australia) ... so far I have not faced any problems with the lens or its image quality ... just this annoying battery drain issue if I forget to leave the VC on while not in use (so most of the time I turn off VC, but when the camera is in use, it does not seem to affect the battery life), so I'm assuming it won't turn into a bigger issue if I never get the circuit board updated - what do you think?