Do not exclude the 100mm and 75-150mm Nikon Series E lenses from your search. They may do not have the prongs (also called rabbit ears) that allow the Nikkormats built-in light meter to work; however, if you are using a hand-held light meter, you do not need the built-in light meter. Also, if you are shooting portraits using flash under studio conditions, you do not need the built-in light meter.