Hi, I'm wondering what factor or mpx  the 24mm zeiss apsc 1.8 would become on the FF 42mpx A7rII?  I have this lens from my older Nex 7 which I sold along with the rest of my lenses from this apsc camera. On the A7 I believe it was about a 10mpx or 12 mpx. I really like this lens and want to keep it. I've used it on the A7rII and it works great. It's very sharp, and the small and lightweight body appeals to me.

18MP if you crop in camera. If you shoot in FF mode and crop later in Lightroom or Capture One you will get 24MP (and a bit wider FOV)