Tamron-F SP Tele-Converter 2X N-AFd BBAR MC7 for Nikon F  type_Cine The Breakthough Photography X4 6-stop

The Breakthough Photography X4 6-stop ND filter is made from premium Schott B270 glass

but compatibility with later Nikon cameras may be limited

maybe you hate your batteries and wish they would run out quicker

"15" is sort of related to the word "Rams"

Takes two CR123 batteries (included)

Tamron-F SP Tele-Converter 2X N-AFd BBAR MC7 for Nikon F &nbsptype_Cine The Breakthough Photography X4 6-stopThe Tamron F SP Tele Converter 2X N AFd BBAR MC7 is a 2x teleconverter for Nikon F mount lenses. This is an autofocus focus teleconverter that will work with any AI, AI S or AF lens with an on lens aperture ring (that is to say, no G type lenses). Light cosmetic wear, clean glass, good function.