I shoot a Olympus E-M1 Mark II in a Nauticam housing and usually use the Olympus 7-14 mm lens and 60 mm macro in Nauticam ports. But I want to use my Olympus 8 mm fisheye more and have an old Zen DP-170 port that I was planning on using with it. My questions are:
1. Would I need an extension ring along with the Zen DP-170 port when using the Olympus 8 mm PRO lens?
2. Is there a better choice of ports for CFWA close focus wide angle type of shooting?
Thanks so much!