Rokinon 7.5/3.5 Fish-Eye Micro Four Thirds $170 OPTIONS_HIDDEN_PRODUCT To find which one works

To find which one works best for you can simulate the strap with a piece of string (that is double the dimension)  and try it on for size

O-ring strap bumpers are made of rubber and are thicker than the other bumpers

5 Fish-Eye in the lens section

They are made from the same leather as the straps and are available in the same colors

Rokinon 7.5/3.5 Fish-Eye Micro Four Thirds $170 OPTIONS_HIDDEN_PRODUCT To find which one worksThis is a Rokinon 7. 5mm f3. 5 fish eye micro four thirds lens. It has no electrical contacts so it is a fully manual lens. It is a full frame fish eye. It is not rectilinear. What it is is fun! Here is an example: