https://www.zenunderwater.com/products/dp-100 new is $899.95usd
Zen Glass dome for Nauticam N120 selling at only USD 480 and the condition is immaculate. You can cover the postage , item is in australia . Pay by paypal for security.
From Bluewater Photo:
This is a small 4-inch glass dome port for use with the Tokina 10-17mm or Nikon 10.5mm fisheye lens on Nauticam housings.
For close-focus wide angle work, Zen Underwater is turning conventional 'big dome' wisdom on its ear with a new 100mm (4") dome port.
Designed specifically for the Nikon DX AF Fisheye-Nikkor 10.5mm f/2.8G ED and the Tokina Fisheye 10-17mm F3.5-4.5 DX zoom, the DP-100 allows the photographer to get in close where a large dome just won't go for stunning close focus wide angle images.
As an added bonus, at only 340g (12oz.), the DP-100 fisheye dome port offers welcome relief to the luggage bloat of dive photo travel and the ever increasing expense associated with checking large heavy camera systems.
Small and Lightweight
Great for close-focus wide angle photography
Includes Front Dome Cap
Underwater Photos from the Zen 100mm glass dome for the Tokina fisheye
The Zen 4-inch glass dome for the Tokina 10-17mm fisheye lens is awesome. Zen makes versions for almost any housing brand, including Ikelite, Sea & Sea, Nauticam, Hugyfot and more. It is difficult to scratch (unlike the regular port), very small for travel, light underwater, very sharp, and it allows me to place my dome in small places where a larger dome would interfere with the subject.
I like to get REALLY CLOSE to my close-focus wide-angle subjects, and the ZEN 4-inch dome let's me do that. Lighting the subject is easier than when I use a larger dome, and I like not having to use an extension ring. The only disadvantage is that you can't do over/under shots. That, and the fact that there is no good neoprene cover that will stay on the port. So protect your port! I recommend this setup for both cropped-sensor and full-frame dSLRs - Scott Gietler