One of the niche, yet loved lenses from the EF mount era is going to get the RF treatment with an all new design in 2024. That lens will be the Canon RF 400mm f/4 DO IS USM.
Canon has made three “DO” branded lenses, all for the EF mount. The first was the original EF 400mm f/4 DO IS USM in 2001, and in 2004 they launched the more affordable zoom offering, the EF 70-300mm f/4.5-5.6 DO IS USM. In 2014, Canon released the EF 400mm f/4 DO IS USM II, which improved the contrast issues found in the first version. All of Canon's past EF DO branded lenses have been discontinued.
We have been told that Canon will once again bring a DO branded lens to the RF mount, in the form of an RF 400mm f/4 DO IS USM. The lens is coming some time in 2024, and will continue to improve on Canon's DO lens designs.
Many years ago, Canon did show off an EF 600mm f/4 DO IS USM prototype that never came to market, but we have received some hints that Canon does have a 600mm DO lens in the pipeline, but not before the RF 400mm f/4 DO IS USM is announced.
Nikon showed some things that made some of us on the Canon site jealous, indeed.
New materials and new production methods should become visible in IQ.
I'd guess $8kUSD though.
Brian
The rumour is for an f/4, not f/2.8.
Just because Canon have alrfeady made two EF 400mm f4 DO's....there is nothing to stop them developing a RF 400mm f2.8 DO.
These are the comparisons I was thinking about. The 200-800 at $1900 is going to be tough to beat for those of us who imagine using a 400+tc. I think the value proposition might only make sense for those who want to shoot at 400mm. This gets you there at a light weight sacrificing one stop of light vs the 400 f/2.8 (a $12k lens) at a lower cost. But the EF 400 DO is still $6,900! I just don't see how the RF version can support even that level. When the EF version came out, effective 600mm at f/8 was the sweet spot achievable with pretty good glass in the $2k range. The 400 f/4 with extenders would get you 560 at f/5.6 or 800 at f/8., thus giving it a reason to exist beyond 400 prime shooting. The new RF 800 at f/9 for under $2k kills that.
All of that is to say, EF price suggest $8k would reasonable, but I don't see why anyone would buy it at that price. You are down to 400 prime shooters who are pros, I don't think they are going to give up the subject separation to save $4k. But I'm not a pro, so I'll leave it there.
If Canon brings an RF 400/4 DO to market, it will be because they believe it will be profitable, and it will be priced accordingly.
As for Rf 400 f4 DO it should weigh less than Sony's new 300 f2.8, preferably 1.2kg or less.