I've been photographing for a few years with a NEX-5 and a NEX-C3. My primary interest is industrial archeology and that's fairly challenging in several respects (including physical, after 60) mainly because of the extreme dynamic range, very low light, and tonal range. Normal configuration is (tripod, of course) NEX-5+Contax Zeiss 50/1.4 and NEX-C3 + CV Heliar 15. I occasionally use other lenses including a Contax Zeiss 80-200, a Nikkor 135/2.8. I even used a Canon 500/8 Reflex (some places are huge).
Now for the question: I had very high expectations on Sony A7. However I have been using it for a while and I am a bit underwhelmed. I do not see a dramatic change from the NEX: sure 24Mpix are handy, but I managed to print fairly good 60x90s from the C3, and noise might be lower. But I do not see a dramatically better rendering (do I dare say, sometimes the opposite)?
Time to change glasses, or someone else has the same feeling?