I'd think that PK sharpener would do about just unsharp mask, radius 0.4 and some pretty hefty amount. PK sharpener does more things, however. It can do noise reduction before the sharpening step, does masking for detail and things like that.
Some reflections in general:
- Radius is dependent on both camera resolution and subject. High resolution and small details need small radius and large amount. Other subjects like portraits benefit more from large radius and less amount.
- Radius 0.4 and amount of 300 may be in line with Canons recommendations. I think that Bruce Fraser at least hinted on amount of 500 in "Image Sharpening with Photoshop CS2" (page 168). Setting a high mount would enhance noise, however, which is the reason that Bruce Fraser recommended to use edge masks for sharpening.
- Some plugins, like Focus magic, can do deconvolution. Deconvolution can correct for problems where the "Point Spread Function" (PSF) is known. The PSF may be known for defocused images and also the AA-filter of specific cameras. Deconvolution is essentially an "undo" for loss of sharpness.
- The smart sharpen filter in Photoshop CS may or may not do deconvolution when "remove lens blur" is selected. It is not stated in the documentation.
- The capture sharpening in ACR and Lightroom is said to be pretty good, probably better than what can be done in Photoshop. It is based on Bruce Fraser's ideas but Adobe engineers have tweaked the algorithms to work better with capture sharpening.
- Photokit Sharpener is still a god tool for doing image enhancement.
Personally I think that the Anti Anti Aliasing filter debate is a little out of proportion. On a high res camera the lens will act as a major contributor to unsharpness at most apertures. Autofocus systems are prone to focusing errors. The AA filter is not there without a purpose and it is a quite expensive part of the system. Systems without AA filters do have problems with moiré patterns.
The 1Ds III files need a fair amount of capture sharpening to counter the effect of a strong AA filter. I have PK sharpener and apply mostly "superfine" ("digital high res"), but have found that in general, even those settings are insufficient. For low ISO shots, I often prefer the good old unsharp mask, with radius about 0.5 pix and amounts in the 200-300 range.
What capture sharpening methods do you use with your 1Ds III ?