I thought it was stated in the past that the test method takes the best-focus value of the multiple test shots, so wouldn't that negate field curvature?
Following from the EF 24-70 I review:
Following from the EF 24-70 I review:
Quote:Our MTF analysis is based on obtaining readings at the sharpest focus setting independent for the center as well as the image borders/corners. It's field curvature invariant. Normally this is a preferable approach because the field curvature isn't really relevant for most lenses and taking the field curvature not into account would produce rather strange resolution curves.
<a class="bbc_url" href="http://snowporing.deviantart.com/">dA</a> Canon 7D2, 7D, 5D2, 600D, 450D, 300D IR modified, 1D, EF-S 10-18, 15-85, EF 35/2, 85/1.8, 135/2, 70-300L, 100-400L, MP-E65, Zeiss 2/50, Sigma 150 macro, 120-300/2.8, Samyang 8mm fisheye, Olympus E-P1, Panasonic 20/1.7, Sony HX9V, Fuji X100.