I post too Much on Here!!
- Jul 21, 2010
Maybe. Canon has prior patents for f/2 zooms, Sigma makes one for EF (although of a much more limited zoom range). An 85/1.2 is certainly not unique to RF, nor are ‘amazing’ lenses. I’d have thought something like an 11-24/4 would be potentially unique to a shorter flange, but Canon went ahead and did it for EF.It does help to make better lenses. Just look at the RF 28-70 F2.0 or a new RF 85 F1.2. These are unique and/or amazing lenses.
Obviously it’s difficult to prove a negative, but it’s not obvious that any of the current RF lenses would be impossible for EF. Similarly, the current lenses as well as the patents we’ve seen do not support the claim that RF lenses can be smaller than EF counterpart (and for the 70-200, the RF version in the patent is actually larger than the current EF).