All of the above comments are good. But, here's the thing. I've got 80mm and 120mm focal lengths covered ala HC lenses. But, occasionally, I get big artworks. I don't need to be able to move the back along x or y, so an image circle that covers a 36 X 48 sensor without vignetting is fine. Lighting is not a concern, as I've got the lighting situation well under control -- big field, even illumination, and polarized. So, the main questions I have specifically about the 60mm lens are about edge-to-edge sharpness, linear distortion (symmetrical or assymetrical), and falloff at f/8.