How to determine the difference between AIS & AI lensgreenspun.com : LUSENET : Nikon Ai / Ai-S Lens : One Thread
HOw do you determine whether you have an AI or an AIS lens?
-- Ed Shomaker (email@example.com), August 14, 2002
AIS lenses look a lot like AI lenses, but have their smallest F/stop marked in ORANGE.
-- Troy Williams (TWALEXANDER@SBCGLOBAL.NET), August 27, 2002.