Canon EF 600mm f/4L IS III coming ahead of Photokina [CR3]

Feb 20, 2016
Does it make sense to upgrade all this glass right before launching a new MILF FF mount? I think it does not. Therefore, my intuition is that the new MILF FF Canon camera will use the EF mount, or some variation of it that may be full compatible with existing EF lenses. But what about the flange distance and focus motor differences required by a MILF camera. Well, maybe these lenses have some hidden upgrade in the focus actuation and/or hardware/firmware that make them more suitable to MILF cameras. In this case, the recent “upgrade” on the 70-200 f2,8 III which apparently didn’t upgrade much, could actually be a “stealth” upgrade, already including internal features that are only going to become relevant once the new MILF FF camera is announced/released...
You'll see that this has nothing to do with mirrorless. Canon won't be targeting professional sports use or the such with their mirrorless at this stage. These lenses will form the backbone of their 2020 Olympics lineup along with the 1DX III. You won't see a mirrorless competitor to A9 for a long time from Canon or Nikon which will also release a D6 next year. The best you can hope for is very good AF speed when used on an adapter on their mirrorless. Will Canon have the AF to match Sony and Nikon's mirrorless though? We know Nikon is targeting A73 and A7R3 and AF is over 400 AF points
Likes: frnd.frts
Aug 31, 2014
I'm just hoping here that Canon have decided that DO elements are now just part of the lens design and that naming lens with DO in the title is no longer a thing, I did a qick search and found this:-

I wonder if thats why the 600 DO prototype has a red ring?


EOS Rebel T7i
Sep 17, 2010
There are several ways that they could save weight. As long as they do so, while keeping build quality and IQ, excellent.
Feb 13, 2013
Czech Republic
I'm still waiting for some 24-70 @ 2.8 Photokina CR3! It is getting close and there is again complete radio silence. And I will even not start about the unicorn (new 50).

Anyway. This is interesting pair to be released together considering how they were released previously. Maybe they will not be just refreshes with new coatings. If these are not just refreshes it will also be interesting to see what will happen with prices - both prices of new models and used MK.II.
Likes: fox40phil


Nov 8, 2011
I wonder how much lighter the new 600 can be. The DO prototype that lacked AF and IS weighted 3.2Kg.
The current 600 4L IS II weighs 3.9Kg...


Aug 23, 2013
I am going to speculate.
New Coating
2 ounces
and $4,000 more

Now to hope,
New Coating
2 pounds
2 more stops of IS
and it is the same price as the II