I liked the ergonomics of the A7R. It was the shutter shock and some of the odd functional mistakes that put me off. The AF system was very odd.The first series A7R that I thought the way to the future was a d-o-g even if that the US use of that word is very derogatory. The rest of the English speaking world sees the expression as indicating a device that was not really properly finished for market - in fact was worse than Beta release. Just hopeless for anything beyond basic photography. Among other issues like placing oft used buttons in styled ledges off the top plate. The difficult grip when your little finger slipped off the bottom ot the grip and cocked finger on shutter button left the body basically in two finger and thumb grip. Very uncomfortable to use and death to low light photography. They had to rush out the lower populated A7S to disguise the failings of its A7R sibling.
I don't ever buy more stuff from a business that sells not well conceived product rushed to market by letting them sort out the issues with a fully paid up copy of that item. My our house rules. I have shunned Sony product ever since - and see how many series of updates of the same thing they have had to sell to willing upgraders since.
So I agree that the A7RII was a much better camera but Sony did the wriong thing with the A7R and got away with it because the idea of the first FF ML body in the A7 series caught the wave of those trying to escape the locked in duopoly of the dslr makers who frankly and commercially were going to milk the "prestige" of the dslr as a "Proper camera".
It was Canon and Nikon that eventually killed the dslr market all in their good time whn the gloss started to come off the profits of the dslr as a type.
I think that the OM3 would probably work for me too.
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