I did some more tests with various cameras (i.e. pixel pitches), lenses (good and bad), at various aperture settings. I won't bore y'all with more QuickMTF plots but results confirmed my view of using ACR's pre-sharpening as a "scene sharpness restorative". I further determined that one setting does not fit all, sad to say. Basically, a bad lens wide open on a small-pixeled camera gives a edge blur of a good few pixels wide - as one might expect. On the other hand, a binned low-res shot with a Sigma SD10 and 70mm Macro at f/5.6 gives an almost perfect edge, needing no pre-sharpening at all (in the sense that any sharpening applied in ACR to such a shot can give an overshoot in the edge spread graph, assuming I got the focus perfect). These "overshoots" that I talk about are seen on-screen as "halos" which are (in my view) preferably applied and adjusted in post.
Maybe "scene sharpness restorative" will pass into photographological obfuscation (PO) as "SSR" - there to join such stalwart acronyms as PP, MP, EV, etc. ;-).
Last edited by xpatUSA; 12th December 2012 at 05:49 AM.
I would have thought the obvious answer is whichever programme you used last before exporting the file.![]()
I never sharpen via ACR, always via Photoshop and always use selective sharpening techniques.
If you wish further info regarding 'selective sharpening' i will be happy to expand.
Tom