Nikon 22mm Eyepieces lens mount_NIkon S and this lens will mount

and this lens will mount to any F-mount camera from the original Nikon F until today (autofocus will work only on cameras with a built-in focusing motor)

Hasselblad CR6 Red colour correction filter in B50 size

it can support up to 20kg

and there may be a few others out there

Nikon 22mm Eyepieces lens mount_NIkon S and this lens will mountThese Nikon 22mm eyepieces will fit Nikon "pro" camera viewfinders, like those found on the F3HP, F4, D800, and D2 3 4 5 6 cameras (plus others with the same thread). Note that these will not fit the non HP F3! These eyepieces include frame and glass; not all are rubberized. Select the eyepiece type from the drop down menu below. Image is for illustration purposes only. Actual item may differ. Diopters generally do not include a rubber bumper.