I was looking for this behemoth lens on the Nauticam port charts with no luck.

Any hint before I write them?

Thank you in advance

Davide,

Great lens—it is on my wish list for above water photography. I’d be surprised if there is a port/housing that would accommodate it, but I’m interested in finding out as well.

Good luck!

It's very long and has a 77mm diameter. A monster and doesn't exist a zoom gear.

A Panaleica 8-18 mm is a wiser choice.

To start with you'll need the 34.7mm N85-N120 adapter that's now discontinued I believe, then a lot of extension. Being 20mm equivalent, the 180mm dome is probably fine. It's heavier (690gr) than my Canon 8-15 which requires about 1800 gr of buoyancy to get near neutral with my setup. I think stick to the 8-18 or the OM 8-25mm 😂.

10 hours ago, Chris Ross said:

I think stick to the 8-18 or the OM 8-25mm

Even the 8-18 mm it's very expensive:

N85 to N120 55 mm Port Adaptor with Lens Control Knob > N120 Extension Ring 20 II > 180mm Optical Glass Wide Angle Port

And of course dedicated zoom gear. We are in the 2.700 euro range plus the lens cost. OMG