07-25-2012, 09:47 AM
It would be interesting, how the trio (20/1.8, 24/1.8, 28/1.8) performs on APS-C. For the 20/1.8 there is a test on Canon, which could indicate a better performance ( http://www.opticallimits.com/canon-eos/2...ew?start=1 ). As an alternative to additional tests on APS-C, one could include MTF measurements at the corresponding APS-C borders in other full frame reviews in the future. Unfortunately, there are still systems with neither fast prime wide angles nor full frame cameras like Pentax.