I'm looking into a glass dome . And my thoughts are going for a ZEN .
For Nauticam mounts, there are two different Zen 100mm models, one for the Nikor 10.5 and one for the Tokina 10-17mm.
The Nauticam 4.33" dome is acrylic. With that dome, the 10.5 is supported with no extension ring, and the 10-17 is supported with a 20mm extension.
I'm rather not buying 2 Zen models , so the question which lens has the preference for you guy's ?
Nikon DX AF Fisheye-Nikkor 10.5mm f/2.8G ED or the Tokina Fisheye 10-17mm F3.5-4.5 DX zoom . By the way I have a Nauticam NA D 300S .
With gratitude , Maluco