Would you want an APS-C camera with an RF mount?

quiquae wrote:

lawny13 wrote:

Then again, there is hope for adaptation with that new FE to Z mount adapter that was announced. The EF-M is a 18 mm flange distance vs the RF's 20. Maybe just maybe an RF to EF-M adapter can be made. But the lens protocols need to be handled. Can you imagine the 28-70 adapted to an EF-M camera?

Rear view of RF 35mm F1.8 IS. Sorry for the lighting from hell; it's my reading lamp....

See that protrusion behind the bayonet blades? That's about 3mm thick, which means about 1mm of the protrusion needs to sink inside the mount cavity if you try to adapt the lens to EF-M. However, the protrusion is also 39mm wide, and the inner diameter of the EF-M mount is only about 33mm. Oops.

So no, RF lens on EF-M is not going to happen. It's physically impossible.

Note that RF 24-105L and 50L do not have elements sticking out the rear end, so those two lenses may be theoretically adaptable. However, this feature on RF 35 is essentially a unvoiced notice from Canon engineers to would-be adapter makers: "we get to abuse the open space behind the bayonet for fun and profit, not you!" Expect to see more lenses designed like this in the future.

Cool, thanks for the illustration.

Personally I don’t need a RF crop. Canon, should add more to the M mount though, as I think it has load of potential. What I would like very much though is for canon to actually release 2-3 small lenses for the RF system within the next year. I get and appreciate what they are doing with the RF lenses. I will definitely be getting the 70-200 for example. But one 2 pancake like lenses... I have very little doubt they would sell well, and that load of users, even pros, would definitely love.

If they brought out a good 50 f1.8 for example... between the 50 stm and the 55 ZA (Zeiss) in terms of performance and price, I would have gotten it yesterday. The same goes for a 28, and a 85 for other people I am certain. A pancake or two would also be picked up by a lot of people, especially for the RP.

The RF bodies  are essentially the same size as a medium level APS-C camera (maybe the RP is smaller even?), so in that sense they are already at the APS-C size as far as that goes. With a few lenses in the hundreds of dollar range it becomes financially competitive to crop considering what you are getting.