Originally posted by jumbleview Both points are well understood. Regarding the first one: if there is the place for high quality camera with fixed lens why there would be no place for camera with set of simple but high quality primes: wide and normal? Regarding the second: I believe parfocal lenses is exclusion, not norm.
All old days zooms were usually parfocal.
I used to work in Film/TV industry , was using big cameras in the Studio / Outside broadcast environments , all manual focus.
You always first fully zoomed in ,do your focus , then the image stays in focus throughout all zooming range.
Still very desirable for Cine Zoom lenses.
Unfortunately the lenses started to get smaller / lighter ( Internal zoom / focus ) and most of them nowadays are varifocal.
For still photos with very fast AF that is not a problem.
But for video "any amount of zooming would require constant refocusing" , it might not be very practical.
I still have a number of old MF zooms , like Tamrons / Vivitars / Takumars / Tokinas etc because they all are parfocal.
---------- Post added 07-03-21 at 16:59 ----------
oh and varifocal lenses suffer from "breathing" syndrome , the size of the image changes while zooming.