I just finished using it for a time-lapse, not more than half an hour before, and now it is causing my a5100 to shut off after a few seconds. I tried the kit lens (16-50) on the a5100 and it works fine. I also tried the Zeiss Touit on my a6000 and it makes it shut off too (while other lenses don't). I'm convinced that it is something in the Zeiss Touit. I also noticed that it makes a strange buzzing noise as power is applied to the camera (either the a5100 or the a6000). The time the camera stays on is almost random, anywhere from a couple seconds to maybe 10 seconds (but never much longer than that). Has anyone had this problem with this camera lens combo? And does anyone have any ideas of any tricks to cure it. If not, back to B&H it goes. It's just a little over a month old so it has to still be under warranty.