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Its a Canon thing, you can't mount EF-S glass on full frame Canon bodies as that is the way they designed the mount (though I suppose Sigma could have used an EF-S mount which would then have accepted EF glass).Should work with any EF mount, including crop body 3rd party lenses, but note for some reason, EF-S lenses will NOT mount at all (which still puzzles me).
What puzzles me, is the Metabones will mount all EF, EF-S, and all third party EF and crop lenses. Also, my older Yongnuo EF adapter will mount the EF/EF-S/3rd party too. So how is it the MC-11 will not?Its a Canon thing, you can't mount EF-S glass on full frame Canon bodies as that is the way they designed the mount (though I suppose Sigma could have used an EF-S mount which would then have accepted EF glass).Should work with any EF mount, including crop body 3rd party lenses, but note for some reason, EF-S lenses will NOT mount at all (which still puzzles me).
I've used Canon 50/1.8 and 70-200/2.8 and Tamron 100-400 - all work fine including with Eye-AF on my A9 though I've not used anything other than the 50 enough to say they work brilliantly. The 50 I found really good using it over Christmas though.
While this is true, I just assumed that EF mount would also mount the EF-S (you can actually mount an EF-S lens with the tab removed on a Canon FF, but you risk damaging the mirror at various focal lengths). So, it makes sense that an EF mount MC-11 adapter would be able to do the same thing. I will examine both the MC-11 and Metabones to see where I can find the difference at.I don't think Sigma actually use the EF-S mount at all on any of their lenses - so even their lenses designed from crop bodies are an EF mount and will mount on full frame. So when producing their MC-11 for use with their lenses - why do something different?
Metabones on the other hand were all about compatibility so why not use the EF-S mount knowing it will also take EF lenses?
I was always pretty sure you couldn't hence videos like this about having to rip bits off them to get them to mount:(you can actually mount an EF-S lens with the tab removed on a Canon FF, but you risk damaging the mirror at various focal lengths)
the problem is that it's a moving target, because of changes to camera firmware, new camera releases, lens firmware changes, etc.
you need to always reference it "wrt" the body being used, here is one thread on the subject: http://www.fredmiranda.com/forum/topic/1418181/24
Canon put in interlocks to ensure that EF-S lenses could not be mounted on EF bodies without aggressive mechanical modifications. This is because EF-S allows for a reduced minimum back focal distance (e.g. optical elements farther back) that would interfere with FF mirrors.Should work with any EF mount, including crop body 3rd party lenses, but note for some reason, EF-S lenses will NOT mount at all (which still puzzles me).
I find focusing with the original A7 miserable with this adapter (as is the case with the Metabones IV T). However, with the A7 II and above, most EF mount lenses are pretty good, with most Sigma EF lenses at near native speed.
Canon put in interlocks to ensure that EF-S lenses could not be mounted on EF bodies without aggressive mechanical modifications. This is because EF-S allows for a reduced minimum back focal distance (e.g. optical elements farther back) that would interfere with FF mirrors.Should work with any EF mount, including crop body 3rd party lenses, but note for some reason, EF-S lenses will NOT mount at all (which still puzzles me).
I find focusing with the original A7 miserable with this adapter (as is the case with the Metabones IV T). However, with the A7 II and above, most EF mount lenses are pretty good, with most Sigma EF lenses at near native speed.
Since Sigma's optical designs must be compatible with Nikon F which doesn't have such a minimum BFD distinction between APS-C and FF bodies, all of Sigma's lenses, even the APS-C ones, have a full frame compatible EF mount.
meanwhile, the rest of us will be out there getting photos that you can't get, using adapted lenses that cost much less, or simply aren't available in e-mount ;-)Note to self based on discussions in this thread: don't by an adapter - wait for 3rd party native glass explosion starting this year and burning brightly as that industry shifts into better partnering with Sony.
You can remove the metal lens mount from the mc-11, take out 4 more screws, and remove the plastic piece inside, re-assemble and you can then mount ef-s lenses also.While this is true, I just assumed that EF mount would also mount the EF-S (you can actually mount an EF-S lens with the tab removed on a Canon FF, but you risk damaging the mirror at various focal lengths). So, it makes sense that an EF mount MC-11 adapter would be able to do the same thing. I will examine both the MC-11 and Metabones to see where I can find the difference at.I don't think Sigma actually use the EF-S mount at all on any of their lenses - so even their lenses designed from crop bodies are an EF mount and will mount on full frame. So when producing their MC-11 for use with their lenses - why do something different?
Metabones on the other hand were all about compatibility so why not use the EF-S mount knowing it will also take EF lenses?
Sorry to bump this dead thread, but I was wondering what kind of Canon 70-200 2.8 you used, I or II, with or without IS etc..With the latest firmware, I can say that the MC-11 works well with:
Tamron 70-200 2.8 VC
Canon 50mm 1.8 STM
Tamron 150-600 g2
Canon 70-200 2.8
Canon 24-70 2.8
Canon 75-300 EF-S (believe it or not)
I bought the cheap Canon 75-300 EF-S years ago for an inexpensive telephoto to focus manually on the Nex-5r with dumb adapter. I found that it mounts to and focuses quickly with both the Metabones Speedbooster (with some vignetting) and the MC-11.
I’ve since tried a few other EF-S lenses with the MC-11, and they would not mount, including an EF-S mount Yongnuo 50mm 1.8 that a friend had.