What does zoom have to do with it since there is no connection. A lens is a lens and as long as the camera is set to AV or M it shouldn't matter going by what you say. And speaking of posting an impossibility!:rolleyes:
Let's not, since primes (by definition) are not, do not and cannot zoom, which make a dubious point moot. Your question makes no cognitive sense. You posited an impossibility.
OK, we agree on how AV & TV work. :eek: But you still can't get f3.5 @ 22mm on my lens. For that matter, any other variable zoom you cannot get the widest aperture at the longest zoom. Will not, can not, and does not happen. Got it?
Think of it this way: when you set your body/lens on Av and zoom, what happens to the aperture?
Nothing: It's frozen in place: that's what "happens".
Instead, your shutter speed "varies" (to balance the exposure).
The opposite "happens" in "S" (Shutter priority) mode: your shutter is frozen in place while the aperture "varies" to balance the exposure.