Nauticam Macro port 60
Great port for use with Nikkor 60mm F2.8G ED lens.
But the port can also be used with the Nikkor 105mm if you add the 30mm extension.
So it is an optimal port for most Nikon-users.
There is an M67 thread, in the end, so you can mount any macro wetlens either direct or via the M67-M67 FLIP mount.
Diameter Top: 67 mm
Depth rating: 100m
Construction: Hard anodised aluminium alloy
Glass material: optical BK-7 (Dia: 65mm; Thickness: 8mm)