« on: February 10, 2012, 12:50:32 PM »
Exactly. I think checking lens MTF charts shall be a good hint. The lower the curves off-centre the likely to fail at the edges at very high Mps (FF sensor). There is a built-in correction for light fall-off in the EOS line but resolution is a different animal. I trust the forum's reassurance though.
This seems like a larger problem that people are making out to me considering a large part of the market for 36 megapixel is going to be landscape and other uses where edge to egde sharpness is desired. Alot of the non specialised lenses people use for landscape like the 17-40 and 24-105 already have problems with boarder sharpness at 21 MP.
I wonder if this is the main reason for the new 24mm and 28mm 2.8 IS's? perhaps Canon are antcipating that there current wide zooms are going to be found wanting for landscape shooting on a high megapixel camera so have designed these primes to allow those on a budget to fully exploit such a camera? would seem to explain why the appatures are relatively modest and why they have IS, the MTF's seem to suggest both will have strong boarder performance stopped down.