Early Nikon F Instruction Manual.  type_Continuous Lighting compact standard lens for film

compact standard lens for film and digital Nikon F-mount SLRs

sharp modern 50mm design with quick autofocus and excellent wide-open performance

This hood is sometimes labelled as an HS-1

All those acronyms basically mean that it's a modern macro lens with an image stabilizer for the X mount

or without the disc for a more direct look

Early Nikon F Instruction Manual. &nbsptype_Continuous Lighting compact standard lens for filmVery Early Nippon Kogaku K. K. (Nikon) instructional manual for the F. English language copy. Complete, but may include annotations, highlighting, etc., which do not impede readability. Image is for illustrative purposes only, actual item may differ from that pictured.