There are several posters on this thread who use a 645D and I'm curious who among them or new users of Pentax plan on getting a 645Z. I'm torn between getting an A7r (and lenses) vs. a 645Z. The high ISO capabilities of the Z will solve vibration problems I have with slow shutter speeds on the D using long focal lengths. On the other hand, I could invest in the Sony and have a camera I could use everywhere without lugging the mass of the 645.
I could get both, but aside from the fact that my wife would kill me, I'm better off using one system. Thoughts?
I've had an A7r for over 8 months now. The reason that I purchased A7r WAS to see if it could replace my 645D. In my original thought, A7r could be better with its CMOS sensor and high ISO capability and liveview and peak focus and etc. And most importantly, it could take all my beloved Contax Zeiss lenses.
Now, 8 months later, I still have my 645D. A7r is not a bad camera by any measure besides that loud shutter. I guess the primary reason that I haven't fallen in love with it is that I still don't know how to handle it. Whenever I hold the A7r, my mind just refuse to treat it like a MF camera. So you know the results.
On the other hand, whenever I put my hands on the 645D, instantly I realize that I need a tripod, a shutter release cable, mirror-up, GND filters, etc. And the outcome rarely disappoints me.
I guess the real challenge with A7r is that we MUST treat it and use it as a MF camera. Once over that bump, A7r could be a very good replacement for the aging 645D.
Eventually I probably will sell 645D and buy a 645Z. 645Z and A7r could be a wonderful 1-2 punch for any landscape shooters.
Just my $0.02.