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| Oly 24/2.8 vs. Canon 24L TS-E II || |
Yes, Oly seems to make it a point to have very even edge-to-edge sharpness.
When I compare my Oly's to my Nikons in particular, it is very obvious to me that other companies have intentionally favored central sharpness (which will be sharper than the Oly in Zone A) at the expense of the edges/corners. I think this isn't a "can't", but rather simply a choice regarding their drawing style they incorporate into their lens design ... not unlike other choices, such as Cof vs. flat, etc.
But, as with all optical compromises, the Oly's tend to vignette more than some others until you get stopped down, and have a touch lower contrast. I find the contrast/tonal values between these two rather interesting.