OK, I have the kit lens and I have a fixed lens. I also hung the a5100 on a telescope. In each case the camera's zoom control adjusted the zoom (I haven't measured the range yet). In the case of the 16-50 zoom lens, it zoomed from 16 to 50mm (as you would expect), but it also zoomed the fixed lens and even when mounted on the telescope with a T-mount adapter. There has to be some specification for this zoom range in each case, but I have yet to read up on it or figure it out (or measure the non-zoom optics zoom range).