Interpreting comparisons is not a trivial exercise; it’s not enough to just take two crops and compare them; an entire mental assessment must be made based on the entire frame.
Here are just some of the issues, assuming that a rigorous test protocol is followed to begin with. And even so, results should be cross-checked by shooting more than once (I did).
Len samples can very significantly. See Brand-new Blur. After years of experience, I’ve learned to recognized lens faults that aren’t inherent to the design, but special attention must be paid here.
Article continues for subscribers...
If you’re already a subscriber, CLICK HERE TO LOG IN
diglloyd Advanced Photography includes hundreds of pages of exclusive coverage and high resolution, Retina-grade example pictures detailing Canon and Nikon DSLR bodies and their lenses, with in-depth analysis of sharpness and contrast, color, bokeh, vignetting, distortion, MTF, and flare. Also included is a wealth of in-context technique and workflow insight. Since 2006, diglloyd Advanced Photography is the authoritative review and on-line reference for discerning Canon and Nikon shooters. Subscriptions cost $ per year.