Nikon Nikkor 28mm f/2.8 Ai-S - Nikon F Mount

The Nikkor 28mm f/2.8 Ai-S is widely regarded as one of Nikon's finest manual focus wide-angle lenses. Its reputation stems from a complex optical design featuring 8 elements in 8 groups and a close-focus correction (CRC) system. This allows the lens to maintain high resolution even at its minimum focus distance of 0.2m. It is a fully mechanical lens with a robust all-metal barrel, compatible with a wide range of film and digital Nikon bodies. For a lens of this age, the most critical check is the condition of the internal lubricants; the focus throw should be silky and smooth with no 'play'. SDS checks for 'oil on blades', a common issue where lubricant migrates to the aperture diaphragm, causing it to stick. Look for any signs of fungus or haze in the internal glass. The Ai-S prong and mount should be checked for warping. A well-maintained copy will have no rattling or loose internal components.