Magic Filters

Never used them, and wondering if they're worth a try. I'll appreciate if any of you guys could share some experiences with them.

I would set it in my wide angle setup (Fujifilm 16-50 f2.8-4.8 + Nauticam MWL-1) for the availabe light dives, adding blue filters to the Z330s in case I need to fire the flash.

By the way, the Fuji 16-50 (58mm filter size) lacks of rear filter holder, and the gap between the lens and the port glass doesn't allow for a screewed frontal filter.

Thanks in advance.