Lenses are not ideal. Most of us have ended up with images in which the corners of the frame look too soft. This is not important for all pictures, but matters when the main subject covers the full frame and focus falloff is obvious. In such cases, post-capture fixes present an opportunity to save the picture. Of course using more appropriate lenses in the first place is the best solution, but it’s too late once you have taken the photo and cannot go back.
I’ll show my technique for improving a photo with lens falloff in the context of a full workflow. I will be using my own commercial detail- extraction and sharpening tools (available at Digital Outback Photo) but the technique is very general and you can easily use your tools of choice, such as plug-ins already found in Photoshop. The initial capture was converted to a TIFF using Iridient Digital’s RAW Developer (www.iridientdigital.com/products/ rawdeveloper.html), which I use because it produces excellent detail.