We're told that a loose roadmap for RF mount lenses in 2020 has been shown to select people and that the plan today is to release between 6 to 8 new RF mount lenses in 2020.
Amongst those lenses will be f/4L zoom lenses, perhaps some of the recent patents give us some clues.
At least one “crazy look-what-we-can-do” lens is coming next year.
There will also be at least one fast L prime lens and a couple of non-L lenses, it's unknown if they'll be zoom or primes or both at this time.
There has been no world on tilt-shift or macro lenses for the RF mount as of yet.
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I believe Canon is following a two-pronged approach. They are releasing lenses that duplicate the most popular EF lenses, which are matched to the common uses of their existing R bodies and they seem to be releasing some lenses that take advantage of the new mount design to show what it's capable of. Internally, it may be like telling the designers, "Okay, you can design this unusual lens, but you also have to get us 4-5 general purpose lenses."
Like a 50mm 1.2 that is bigger and heavier than the EF one, or a 70-200mm 2.8 that is fatter and probably heavier than the EF one? And it'll probably be twice the price as well, to keep the RF tradition alive. Oh how about a 24-105 that's pretty much identical in specs and IQ to the EF II? How's that an advantage?
Canon's RF designers seem to have Sigma Envy and want to show that they too have big manly bits. Meanwhile I'm looking at the EF 35mm IS because it's small and light.
Otherwise, I see a couple of non-L primes, maybe a 24 and 50 and some additional high-end primes.
It's maximum magnification is 1:2, basically 50%. A true Macro has 100% magnification or better, though there is some variance in that theory.
The 100 f/2.8 IS Macro works quite well on the RF as it is.
The 50/1.2 RF is a spectacular lens, and the 24-105 f/4 is as good a 24-105 as you can get. I'd rate it to be a bit better than the EF version, at least version I which I also have. The bokeh is excellent.
I do agree - some smaller, light lenses in the spirit of the older EF USM primes would be nice. Size does matter a lot of the time.