Just a thought - can you see if the eyepiece of a Nauticam one fits? I've just aquired the Subal 45o for my D500 one and it looks remarkably like the eye piece on my old Olympus/Nauticam housing but that is just from memory. The Olympus and eyecap are now a molten mass somewhere in the Red Sea, hence my conversion to Nikon![]()
OOOh just had a thought binocular eye caps EBay loads of different dimensions?????