I'm transitioning from a Nikon D90 to a Nikon D7100. I've shot in manual mode for a year or so, and have gotten comfortable with it. When working with the new camera though, when in manual mode and getting things adjusted for the shot, it will kick to "Bulb", then my next click to + or - side it will go full bars either way (with only one click) instead of gradually. I'm suspecting I have something set to Auto on the camera that I'm not aware of, but I don't know what it would be. Any suggestions?