NIKON RIGHT ANGLE FINDER F F2 F3 F3AF FA FE FE2 FM FM2 FM3A NIKKORMAT NIKOMAT
This
is a Nikon right angle view attachment. It is compatible with Nikon SLR
viewfinders with a 19 mm round viewing eyepiece thread. Some examples
include the F, F2, F3, F3AF, FA, FE, FE2, FM, FM2, FM3A and
Nikkormat/Nikomat series finders. This attachment makes cameras more versatile allowing different angles from the viewfinder.