MB_SPNFG-X-BM2 FUJI-Nikon G - MetabonesEAN  4897050181478

Features:
Industry's best aperture ring covers a 8-stop range with half-stop markings, clearly indicating actual number of f-stops. No more guesswork! (Patent pending).
Compatible with both Nikkor G lens & F lens (include non-AI & AI lens mounts).
Increase maximum aperture by 1 stop.
Increase MTF.
Makes lens 0.71x wider.
Optics designed by Caldwell Photographic in the USA (patent pending).
The tripod foot is detachable and compatible with Arca Swiss, Markins, Photo cam ball heads.
Tips: Before mounting your lens to the adaptor, please make sure that the f-stop of aperture ring on the adaptor is turned to "8" (i.e. mounting your lens to the adaptor while only the aperture ring in the adaptor is full closed.).
Remark: This mount is manual aperture control. It does NOT support electronic aperture control.

LENTI INCOMPATIBILI:
Nikkor 21mm f4
Nikkor 20mm f2.8 AI-S