What is a Nikkor-S.C? Back in the day Nikon had a system of letters for different numbers of elements in the lens. "S" is short for "Sept." which indicates seven elements. "C" indicates that it is the later version with multicoating. This is the best version of this classic lens. This is a beautiful 50mm for the Nikon Rangefinder S Mount. The glass is clean and scratch free and everything works perfectly. SKU: 200901-12