RF24-70 & RF15-35 Reviews

Michael Clark

Now we see through a glass, darkly...
Apr 5, 2016
990
484
But that leads to one question:
If you are right here (R&D on field curvature), why do the RF primes look so well on flat field?

I would assume that Canon R&D would take the same primary IQ goals (field curvature sharpness) for lens design, even though primes and zooms are designed differently.
A well-recognized authority far more knowledgeable than I goes into fairly great detail to explain field of focus at the link in my above comment.

As to why RF primes look so well on flat field:

Because the makers of practically every new lens for the last half decade or so have sold their souls to the gods of the flat test chart. Why? Because most of the masses buying the majority of lenses on the market these days are too ignorant to realize that "sharpest" shooting a flat test chart does not always mean "best" for real world usage.
 
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Larsskv

EOS 7D MK II
Jun 12, 2015
770
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A well-recognized authority far more knowledgeable than I goes into fairly great detail to explain field of focus at the link in my above comment.

As to why RF primes look so well on flat field:

Because the makers of practically every new lens for the last half decade or so have sold their souls to the gods of the flat test chart. Why? Because most of the masses buying the majority of lenses on the market these days are too ignorant to realize that "sharpest" shooting a flat test chart does not always mean "best" for real world usage.
I agree! I for one love the images I get from the EF 50L and the EF 85LII. They make subjects look good in a way few other lenses can.

I sold my EF50L after getting the RF50L, but bought another one after a few months. I absolutely love the RF50L, but it hasn’t made the EF50L obsolete in my camera bag.