Obviously true, it does make me question though what software like Capture One and Phocus exactly add when they say they perform lens corrections...
Edge Sharpness in C1 does not perform a miracle. It just sharpens the edges, the middle, and the center of the frame differently. It does so through some proprietary algorithms but from my experimentation it seems to be roughly the same as progressively increasing the radius and amount of the unsharp mask being applied.
But importantly it's many many times faster to turn up a slider marked "Sharpness Falloff Correction" then to first process the image (losing all advantages of a raw workflow), open in Photoshop, duplicate the background layer several times, apply several different unsharp masks (doing it on one layer will risk really ugly ghosts of halos), and then blend them together to create a progressive amount of sharpening. Even if you did an action or script in PS it's still tons faster to do in C1 via a single slider (and you don't have to leave raw).
Plus you can copy/paste the adjustment to several hundred files shot with the same lens in literally a few seconds.
It does NOT create detail that didn't exist - nothing can do that. It DOES bring out the best in the file - and with virtually zero effort.
Forgive a bit of over-simplification: really it is a continuous change but for the purpose of simple explanation we'll say edge/middle/center
Doug Peterson (e-mail Me)
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