I used with a Nikon 60mm f2.8, on a very dark and gloomy day. For reference purposes, the water temp was 4 degrees, and I lost all sensation in my hands for most of the dive (despite dry gloves!) The port gives really nice results-sharp and it corrects the parallax that you get with conventional flat ports. I will definitely try it some more
More NatGeo Explorer Stuff
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I spent a few hours with some of fellow Explorer Adam's graduate students
at Tokyo Metropolitan University yesterday.
[image: tokyo metropolitan universit...
5 days ago