MTF50 in LW/PH numbers what they mean? how big difference is easily found in real world landscape type images (all things are sharp pictures i mean) when sensor is 12mp NIkon crop (d300s). ei mean is hard trust my lens have similar numbers than what lenses what photozone used.
Are you just curious or do you have problems with image quality?
If you are happy with your prints and screen views: Well, what's all that fuss about? ;-) Stop reading test reviews and go on improving your skills as a photographer.
If you do have problems with image quality and the "usual suspects" have been eliminated
(sturdy tripod used: Check! Aperture stopped down to f8/f11: Check! Cheap filters avoided: Check! Keeping ISO low: Check! AF errors avoided, using MF and live view instead: Check! Sharpening in postprocessing understood and applied properly: Check! Andandand.) ...
Still there with me?
Ciao, Walter