From Photography is Malaysia Nikkor 28mm f2.0 Lens
Bjørn Rørslett says (referring to Nikkor 28 mm f/2 AI) "The high-speed 28 Nikkor is unusual in having its close-range correction (CRC) executed with the front elements, not with the rear as the case is with other wide-angles. It offers outstandingly sharp images and these are produced at all aperture settings from f/2 to f/8 with just a trace of corner softness at the wider settings. Field curvature is modest in terms of wide-angle lenses. Peak performance occurs between f/4 and f/5.6. When stopped down beyond f/11, sharpness suffers however. This lens is unusually resistant to flare and ghosting and eminently suitable for shooting directly into the sun. Never catching the buyers' fancy, this is an uncommon lens which is indicative of the perils of free enterprise."
