My Burris BTS auto shutters every 2 minutes, I can switch shutter calibrating. The other shutter calibrating settings require the lens cover shut, starting calibration is a touch to power button. I didn't want to accidentally start a shutter calibration, while hunting or moving rifle. This hasn't been a problem, but if I can get a mdvr and cable I may have to change so video is not interrupted for 2-3 seconds.