A Bit More About the New “Big White” Lenses Coming from Canon [CR3]


Pro sports photographer
Either that or Canon has been releasing updated lenses with the (thus far silent) ability to work with new features and enhanced capabilities of planned future camera bodies that will use the EF mount.

I´ve been thinking a lot about this "mount subject". Especially since there is a patent for what I like to call an "EF mkII communication protocol".

As of today EF lenses are fully compatible with EF-s bodies. I.E. EF and EF-s mounts, use the same "pinning" and the same communication protocol.

If Canon decides to go with a "new" mount for FF Mirorless bodies. It would be the most logical, and practical, solution.
To go just the same way again.
Go with the "EF mkII communication protocol". And then either make it possible to use EF-lenses with our without some kind of "adapter".
Depending on what "lens-gap" they will use. That would make all existing EF-lenses usable.
It would also be possible for upcoming EF-lenses with improved performance.

I would actually be surprised if some existing lenses. Like the EF 70-200/2,8L IS III USM doesn't already have the "EF mkII communication protocol" built into it.


Jul 10, 2015
yes, some time ago there were rumors of an 800 DO and a 1000 DO. As I suggested in an earlier post, these might be a "gen III" lens, not a Mk III lens.
Well, this is a rumors site.

Michael Clark

Now we see through a glass, darkly...
Apr 5, 2016
Yes, and you obviously miss read my original comment. Which was:

I am not buying this rumor, at least the version III part.
Those lenses just haven't been out long enough.

The EF 300mm f/2.8 L IS II and the EF 400mm f/2.8 L IS II were both announced in 2010 and released in early 2011. If their replacements are announced in Q3 of 2018 and ship in early 2019, that will be eight years.

That's not too far off the 8.5 years the EF 70-200mm f/2.8 L IS II had before being replaced by the EF 70-200mm f/2.8 L IS III.

This would be especially reasonable in the case that the primary reason for the "short" updates is to make the newer versions compatible with features/performance enhancements of an impending camera body that require them for full capability.
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