The EF-M lenses would as a substitute be RF mount on this case. They may have the identical slim barrel measurement with a slight flare on the base to suit the larger mount. Some clown on this discussion board I am now blocking claims such a flare would kill gross sales for the lens line however I can not see how. Lenses have all the time offered fantastic getting huge in the direction of the entrance so I do not see why the reverse could be the case. Identical to the digital camera, the lenses would not enhance in quantity, and I do not suppose individuals care concerning the diameter of lenses of their backpack or lens shelf at dwelling, however fairly the amount.
So amongst these lenses, some might be small picture circle because the EF-M lenses actually are. However they may even have launched fairly a lot of modest primes–which my lens line idea would name shopper or avenue lenses–with full-sensor picture circles, for nearly the identical value as small-sensor-image circle. (As an example 24/2.8, 35/2, 50/2 or 85/2.8), the price of the optics themselves is tiny; extra money is unquestionably going into the lens barrel, IS sensors and motors, and so forth.) Since these lenses could be not just for the small-sensor cameras but additionally getting ready the way in which for a possible full-frame sensor digital camera, they may afford to introduce just a few extra of them. To illustrate. As to why the small-sensor shooter would need them? They’d solely be fractionally heavier or dearer to purchase. Nonetheless they’d in all probability have far much less vignetting. And this may maintain out the promise (to the extent the customers had been even conscious they had been shopping for full-frame lenses) that the lenses would proceed to have critical worth used, and that their system would proceed on for many years, in each methods defending their funding.
OK, at this level, we’ve an alternate-reality stuffed with RF-mount lenses (some with small picture circle) and RF-mount cameras with small sensors. If Canon by no means introduces the full-frame mirrorless, truthful sufficient, no actual hurt completed. Simply maintain making these small-sensor RF our bodies, in some unspecified time in the future neglect the big-image-circle lenses, and simply assist this M-like RF ecosystem for many years.
However actually, Canon, they DID introduce the R with its full-frame sensor. And given the above technique, then from the very first day there’s be not solely a number of extra full-sensor lenses accessible (lenses the RF lineup is sorely lacking immediately, thoughts you!) however a bunch of compact small-image-circle that, at a pinch, might be used on full-frame our bodies.
And word a particular capability such a lens would have: it casts a round picture on the full-frame sensor, however you needn’t crop it to a particular rectangle at publicity time. It can save you the entire picture, and in submit processing, take a standard 3:2 reduce, or a vertical 2:3. Or a sq., or no matter. If the digital camera wasn’t leveled you possibly can rotate the picture just a few levels with out shedding pixels. This might give a profit to utilizing a full-frame R physique with a small-circle lens that you just would not have with a small-sensor physique. Briefly this mixture could be mid-way between the present R and M strains in energy and backbone.
I want Canon had gone down this highway. I want I may simply put the 22/2 or 18-55 zoom on my R physique every now and then, once I needed one thing smaller in my backpack than my 24-120 however did not need to go purchase a complete second M outfit to have extra portability and extra importantly make investments the massive time commiting the brand new system to muscle reminiscence, establishing the workflow, and so forth.