Originally posted by Nicolas06 I have checked that but it doesn't hold water. It is more expensive, no better overall and while you gain 1 or 2 small UWA primes, in exchange you have to go bigger teles. Just look honestly what equivalent there is of FA77 f/1.8. Issue is it much more important to have a fast tele than a fast UWA. Sony A7 serie is the worst of all because you also get a larger sensor, meaning you need to apply 1.5X crop ratio to you focal length to keep the same reach. No way to get a small 135mm f/2.8 to replace that FA77 f/1.8 on APSC. The latest A7 bodies (A7-II, A7R-II) have the weight of K-S2 so there nothing smaller about it.
Yes ... unfortunately, we can't have it all. I came to the conclusion that you can't have the best of all camera systems in all in one, but you can have:
- all purpose camera and all purpose lenses, the combo is good at everything when you exclude all specialized systems
- specialized system, excellent at one use case, but mediocre to most other things
A D5 and 300 f2.8 is a monster of performance for sports, but the combo weight a ton. No need of a detailed analysis, from top down, you know where you are already (if there were predefined categories of cameras)! The advantage of thinking in terms of system categories is that you don't get lost. If you consider A7 for wildlife / sport photog, you already took the wrong direction. If you do landscape, site seeing and architecture and never shot fast moving distant subjects, why have a heavy system? If you do photog of fast moving distant subjects, why have inconvenient tiny body with huge lens on it. I mean , this is common sense, although people still just do this: get a 10 FPS 1.5Kg DSLR for landscape, and get a tiny Sony A6000 with on 3.5kg 500mm lens on it for sports.