Nikon L37C 39mm UV-filter

The Nikon L37C is a UV filter designed to absorb ultraviolet light and help maintain clear images with good contrast. Its multilayer coating reduces reflections, and it can also be used to protect the front element of a compatible lens.

This version has a 39mm diameter. Note that Nikon produced both screw-in and bayonet versions of the L37C, so check that the fitting matches your lens.