For my Aquatica I have both the Subsee and Aquatica systems. Optically, I think they are comparable, but the mounting system for the Subsee is inferior (this is why I switched to Aquatica). The Subsee mounting ring for Aquatica has no lock opposite the hinge that swings the diopter away. The thumbscrew tension is the only thing holding the lens from swinging out. This gives out over time because of the soft plastic used for manufacture. I started having problems with this after only 10 dives! In contrast, the Subsee mounting ring that is compatible with Ikelite has a twist lock opposite the hinge, and gave me no problems for years. So optically similar, but Subsee is not so good if you are putting it on an Aquatica housing. I would buy the 10+ diopter before the 5+.
- Stewart L. Sy likes this