p.6 #1 · Adapted vs Native. Any real tests out there
I personally prefer using Canon lenses on the MC-11 and the Sigma Art lenses on the Metabones adapter as this allows all my lenses to be in (for all intents and purposes) "Green Mode."
I have found the Sigma Art lenses (20, 35, 50, 135) to all function somewhat unreliably in various ways on the MC-11 for my uses. However, in "Green Mode" via MB IV T, they all operate beautifully in AF-C albeit without some of the focus modes/features. For the way that I shoot though, this is perfectly fine.
Out of the bunch, the Sigma 20 seems to do the best on the MC-11 if you want to have access to all of the focus features. Even so, it isn't perfect.
Contrary to what some have stated earlier in the thread about adapted lenses not operating well in lesser lighting, I have had great success most of my lenses even indoor. I've had enough success (A7R2 and now A9) that I haven't missed any of my Canon DSLRs over the last couple of years.
I also recently replaced the Sigma 35 with the Canon 35 mk2 which also operates beautifully via both adapters.
FWIW, (in Green Mode) the Canon 100/2.0 focuses perfectly across the frame on both adapters. The Canon 85L MK2 and 200/2.0 IS only works well in about 70% of the frame and will not achieve focus outside of those points. The 85 seems to be slightly faster and definitely more consistently accurate on the A9 than I ever experienced on the Canon bodies.
All that being said, the Sony GM 85 operates beautifully with all of the native features (especially eye focus). However, for the way that I shoot, the hit rate isn't all that different from when I am using the Canon.
I just received my copy of the 70-200 GM yesterday and all I can say is that I'm finally starting to see the potential of the native features which leads me to wanting other native lenses that perform on par. With what I have tried so far though (28/2.0, 35/1.4, 55/1.8, 85/1.4), the zoom appears to be the only one that has been convincing so I don't fathom I'll be selling my EF mount glass any time soon.
On a more niche note, I have a Conurus EF mount converted Contax N 50/1.4 that works across the frame in Green Mode. Probably not applicable to many, but figured there might be at least one other person who might be interested to know. lol.
p.6 #3 · Adapted vs Native. Any real tests out there
i found out the hard way for some reason the MC-11 / A9 combo doesn't support Canon IS when adapted. I tried using it with my 70-200F2.8, and got the no steady shot symbol. I'll have to double check on my A7r2, but I am tired of the adapted game and hopefully will have two G master zooms by the end of the year.
p.6 #4 · Adapted vs Native. Any real tests out there
I wouldn't put it that way. In fact, the MC-11 supports Canon IS, but when a Canon lens with IS is attached, the adapter disables IBIS on camera, no matter the settings you selected on the menu. The Metabones, AFAIK, leaves the user the options to activate either IBIS or IS on lens, as well as both working together or none. With the MC-11 it's IS on lens or nothing.
p.6 #6 · Adapted vs Native. Any real tests out there
Another quirk I've noticed on MC-11 -vs- MB IV, (Using Canon lenses - 100-400 II, 70-200 II mostly in my case) on a6500 and a7r2 FWIW:
If you switch to manual focus, then magnify, IS does not stay on, making it very hard to focus in many cases.
This has been the case since the MC-11 came out, AFAIK. Still the same on latest FW.
The Metabones works fine under these same settings, allowing IS to stay on.
I generally find very few differences between the two (using Canon lenses) otherwise. As stated earlier, I don't much care for using my Sigma 35 1.4 with the MC-11 because it behaves like a Sony native lens which doesn't seem to help me most times. I rarely use eye focus etc... so that isn't a big deal for me and it doesn't work all that well on the MC-11 / Sigma 35 1.4 in my experience anyway.
