View Full Version : Opening size on Ports

Papa Bear
10-05-2007, 04:18 PM
Is there any standardization on port opening size. Such as Sea & Sea uses 4.25 inch while Jonah Uses 3.75 inch openings. It would be nice to know who's ports will interchange for mixing and matching with lenses etc. So Ikelite? Sobel? Aquatica? any information as to each ones bayonet type mount opening size?