World Minimum Nikon Silver-ring Filter
World Minimum Nikon Silver Filter
They are mini-filters made by Nippon Kogaku.
NIPPON KOGAKU JAPAN Y48
According to my long time researching,
I think this is the smallest Nikon white filter all over the world.
If you mount this small filter on your camera, you can understand ant's heart.
NIPPON KOGAKU JAPAN Engraved Mark
Size Comparison with Olympus Pen 22.5 mm Filter
NIKKOREX-8 Designated Filters and Hood
Nikon Kenkyukai Tokyo Meeting
We talked about the 15.0 mm Silver-ring Filters at the Nikon Kenkyukai Tokyo Meeting in January, 2006.
D-Mount Lenses and Nikon 15.0 mm Silver-ring Filters
NIKKOREX-8 Designated Filters and Hoods
Nikon 15.0mm Silver-ring Filters and Paper Box