Underwater Double M67 Swing Flip Diopter Adapter for M67 Macro Port.
This great new diopter holder turns any port with a 67mm thread into a flip adapter. easily flip a macro diopter onto the front of your port. It will protect the ports securely without rotating. Or easily attach macro lens with 67mm threaded, like INON UCL-330, UCL-165M67 or UN UNCU-01 Close-up Lenses to have macro photos.