Quote:Photozone reviewers use sharpening in their MTF workflow. Sharpening is not linear (to a point unsharp results will benefit more that sharp results) soyou can not really compare cross platform like that. Another thing the sharpening prohibits is judging the real impact from diffraction.
Actually we select the parameters according to the metric that the best results are neither under- nor oversharpened (which is provided by Imatest in %).
Please note that an AA filter is essentially a negative sharpening filter that have an impact on diffraction just as sharpening. Essentially we are just equalizing the forces by introducing a similar amount of counter sharpening.
The same metric is actually used across all systems.
The idea is also to provide real world results. No user on mother earth is using RAW data as is.