Canon to Merge Two Lenses Into an RF 24-70mm f/2L IS?

You mean, where´s your 600/4+1.4&2.0 TC :)
Thinking more about this desirable, yet hypothetical lens, there’s probably room for one TC in the optical path as it is (assuming they keep the drop-in filter), but not for two of them. The lens is already quite long as it is. Makes me wonder if they will release it as a DO lens…
 
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That would make a great spiritual successor for the RF 24-105mm F4 L. While I do believe going longer will eventually happen with successor for this lens, I doubt it will be wider. 24-120mm is a five-times zoom, 20-120mm would be a six-times zoom. I think there hasn't been a six-times L zoom with the exception of the EF 28-300mm F3.5-5.6 L zoom. And the reports its quality weren't really favorable. In addition, the difference between 20-24mm is really difficult to achieve, it is much more work than "just 4mm wider" would suggest. Lastly, I do believe Canon could deliver a 20-70mm F2.8 in order to differentiate from the rumored 24-70mm F2, but I don't believe "20mm is the new 24mm". If Canon would upgrade all zooms starting at 24mm with a 20mm replacement, they'd surely cannibalise their UWA zooms. We know Canon doesn't like to do that.
Perhaps a 20-105 F4L (approximately a five times zoom)? This, or the rumoured 20-70 f2.8L, would the the one lens to rule over my collection of lens for 1-lens travel kit.
 
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Interesting. Find it hard to imagine selling my 28-70 f/2. It has captured so many beautiful moments in my growing family’s life. Rarely if ever feel it’s not wide enough for events and the likes. Don’t mind the weight too much for the times that I use it. Would have been more interested in getting the best/lightest 24-70 f/2.8 Canon can make to complement it. Hmmm.

My thoughts were similar to yours. I love my 28-70 F2. It is by far my most used lens (outside of sports and wildlife). It has traveled all over the globe with me and is always there for family events. When first bought it and sold my EF 24-70 F2.8 II, I would feel it a bit tight on the side side. I got the 16 F2.8 just to manage wide angle enxiety 😁 . But over time I realized that I swapped in the 16 very, very rarely.

I don't mind the weight and size of the 28-70 F2 too much. Or better, I think it is worth the effort to carry it around.

All that said, a lighter version at the same IQ and and extra 4mm at the wide end would get my money instantly.
 
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Thinking more about this desirable, yet hypothetical lens, there’s probably room for one TC in the optical path as it is (assuming they keep the drop-in filter), but not for two of them. The lens is already quite long as it is. Makes me wonder if they will release it as a DO lens…
do they really need to stack two 1.4x? perhaps there are other designs.
 
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Interesting. At first I thought: no way they're going to take a 24-70/2.8 and make it a stop faster without a significant increase in weight. Physics doesn't work that way.

But Sony has shown that a 28-70/2 can be made much lighter, so if Canon take that as a starting point and then create a design where distortion corrections are sacrificed for a wider focal length rage, then voila. Canon turned EF 16-35/4 into RF 14-35/4, so it seems reasonable that they could stretch 28-70 into 24-70 using similar techniques.

I think such a lens would be an instant hit for wedding photography and photojournalism. Wedding photography is tiring, and a lighter lens will be appreciated. Plus the extra 4 mm will make a big difference too.
 
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