[quote name='you2' timestamp='1325698288' post='14293']
My guess is reaching the limitation of resolution of the lens. I.e, newer aps-c like the 7d have smaller pixels and therefore require higher resolution from the lens to maximize the sensor. Having said that I did not actually check how it 'fared' worse and presumed (perhaps incorrectly) it was a resolution issue.
Actuallly, no. But aberrations become much clearer due to finer grained pixelpeeping possibilities.
Lenses still outresolve sensors, if you want to call it that anyway <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='
' />. Before sensors start "outresolving" lenses, we need 280+ MP sensors.
However, what you do see, and this is also true for the FF test, is that this lens shows fairly strong coma wide open and close to wide open. This is where the Canon 85L and 85L II are quite strong, as they have a special element for correction of coma, according to Canon anyway. This is the backmost, static element in the 85L's optical design.
Kind regards, Wim
Gear: Canon EOS R with 3 primes and 2 zooms, 4 EF-R adapters, Canon EOS 5 (analog), 9 Canon EF primes, a lone Canon EF zoom, 2 extenders, 2 converters, tubes; Olympus OM-D 1 Mk II & Pen F with 12 primes, 6 zooms, and 3 Metabones EF-MFT adapters ....