watboy 9 Posted December 2, 2015 I'm going to Palau for New Years, and have decided to finally get a big dome for some rectilinear wide angle as well as try my luck with over/unders at jellyfish lake. Ordered a Nauticam 180 port and N85 to 120 adaptor to use the Oly 7-14 pro on my EM1. Anyone know the bouyancy characteristics of this port? I currently use 2 ports, a 4.33" acrylic mini dome for the Pany fisheye, and the 12-50 port for 12-50 and 60mm macro lens / subsee diopter. Wondering what to expect what the bouyancy difference will be between the 120mm glass dome vs the 4.33" acrylic mini port. Will I need more floats? thanks Share this post Link to post Share on other sites
EspenB 15 Posted December 7, 2015 I can attest to the 180 mm being a nice dome size for under/over shoots. Made a hell of a difference compared to my plexidome. While the dome and adaptor is heavy its also big so negative bouancy is not a big problem IMO. Tjis is using the Pana 7-14 mm. The Oly 7-14 is substantially heavier. Share this post Link to post Share on other sites
watboy 9 Posted January 14, 2016 Update Nauticam with glass dome, 2 Z240's, 2 7" arms and 4 jumbo stix floats, slightly negative. With 2 9" arms and 6 jumbo stix float, microscopically positively, had to add a focus light to make it neutral. I found that i preferred slightly negative more. Purely neutral gets annoying when I wanted to stow the camera to deploy an SMB. Share this post Link to post Share on other sites
ml3456 0 Posted January 16, 2016 When I go to the 6" Nauticam wide angle port from my 12-50 mm port I have to remove two jumbo float stix so its not overly buoyant. Share this post Link to post Share on other sites
