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Thanks, great explanation! what about normal lenses? let's say, how would they calculate the dream lens front element? (50mm f0.95).

Hey Frank, would you share how to calculate the resulting front element size? I have read it a lot on the forum and I would like to know the math behind it. Thanks!

it does not have a dedicated focus ring. Can it be manually focussed with the "control ring"?

28th years to give it IS but to remove 1/3rd of a stop and an ok autofocus system? Is this the "Revolution" of the R mount? or R stands for "maRketing"? I would expect at least, the same specs the past lens had but with real improvements (e.i RF 85mm f1.8 IS USM) And don't get me wrong, I...

1199$ for a camera that don't do 24fps 1080p video? what is this? 2008? hahaha! When all its predecessors has it (70D, 80D, 77d, even the rebels) There is no excuse but to wanted crippling the camera. Sad! I was really hoping to upgrade my 70D, but none the RP/90D do 24fps

I understand that there is not as easy as it sounds, but for instance, they made a new mount expensier bigger heavier lens with the same speed (RF 50mm 1.2L vs EF 50mm 1.2L). And for that they are charging 900$ more. Ok, it is far much better optically but what would you expect from an updated...

I was expecting all the new lenses comming to this new mount were at least one stop faster (with all this buzz/engineering-justification for dropping EF mount). Otherwise, it seems to me just a very expensive (paint job/aesthetics) updated EF version.

Is this for the US too? I have mine repaired on february 2017 because of that issue. 400$ :'( If it happens again, i might not worry about it.