I find myself occasionally shooting people for my workplace, and more and more I find that in the unpredictable contexts I'm shooting I would feel more comfortable with a zoom lens. My last shoot was with primes and I had to change focal 2-3 times during the same session, which is rather unnerving. A while ago I had done the same job with a d****l + zoom camera and the variable focal was a real helper here. I shoot mostly with flash light. So I've been looking for zooms in M42 mount that would cover something between 35 to 80 mm focal, and sadly Pentax never did one in M42. They only did an 85-210, which is way too long for my needs. I eventually found a page about someone using a Revuenon 28-70, which would be awesome, if only I could find it anywhere. My fear is that most zoom in M42 mount date from the "bad zoom" era, suffering from lots of flare, lack of sharpness, whatnot. The other option I could consider is to use a second body. Used spotties go for about the same price as better zoom lenses, so I wanted a second opinion on the matter: zoom or second body?