Nauticam MFO-3

Rob Aarsen · Issue 147, Nov/Dec 2025 · pp. 31–33

Products mentioned: Nauticam MFO-3, Nikon D810, Nauticam housing, Sea & Sea strobes, 105mm macro lens

This autumn, divers in the Netherlands were captivated by a grey triggerfish. Normally, they live further south in the Atlantic Ocean. But this wanderer had made a burrow in the Frans Kok Reef – one of the busiest diving sites in the Grevelingenmeer – where he (or she) seemed quite content. Naturally, such a rare sighting calls for photographs. The question is: do you take the 105mm macro or the wider 60mm for a portrait? The 105 is perfect for a goby, but this creature — an adult about 45 centimeters long — won’t fit in the frame with a 105. So go for the 60 after all…? A new close- up wet lens from Nauticam, the Mid- Range Focus Optimizer (MFO-3), solves this dilemma. Turning the 105 into a 60 The MFO-3 is a wet lens that mounts in front of the port on your underwater housing. It was developed at the request of Alex Mustard, who found during a blackwater photo trip that some subjects w…