Frank, sorry, I cut short my last since I had to take my son to his Math Tuition
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Short answer no, not on the same level as the EM1. A noticeable difference in speed and positive acquisition. The only slow Olympus lens I use is the 9-18 f4-5.6. Everything else is f2.8 or faster. Of course I am only using the a7II (just was not going to pay the money for the a7RII) . Also, Olympus IBIS is noticeably better than Sony's . ISO -wise I do not find the a7II much better at 3200-6400 than the D700 but have not tested that out. Just from normal shooting. If I could only have one between the D750 and a7II the a7II would go.
The biggest limitation are with the lenses, which is why many are using 3rd party. Canon shooters have it pretty easy since the electronic adapters work well. I have the 55 1.8, as recommended by a NG Supporter, the Two Batis, Loxia 50 f2 and the 90 2.8 Macro. Soon to have the 35 2.8 from J.A. . Not overly happy with the 90 f2.8. Should have bought a very good older macro. Not one zoom that I am interested in at the prices. Bummer, and I sold my Nikon 35-70 2.8 . If Sony doesn't deliver on their promises by the next big show (Feb.) I think they should get out of the lens business and go into another,or more, Zeiss type agreements and concentrate on Sensors and cameras. I was hoping that the Commlite adapter would be good (not given up yet and there is another one being developed) . So I had planned to use a few of my Nikon afs (G) zooms.
The Sony is fun and I've purchased several MF lenses that my wife will bring back next month and a M-to m43 adapter
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Cheers,
Tom