Nauticam port extensions to adapt various lenses to fit one port. These lock in place with port and housing. Comes in N120 (DSLR), N100 (mirrorless) and N85 (micro 4/3rds) mount sizes. Includes cover, extra oring and silicone grease.
Underwater photographers have always debated their cameras and there are always questions and continuing debates about the virtues and performance of various formats. We cover all of their pros and cons in our free Handbook: Choosing an Underwater Camera & Housing, but here's my experience.