eos-1n rs, dream film camera for shooting action because of the frame rate and the pellicle mirror. Actually it's just my dream 35mm SLR…but yeah, totally check that camera out. Compatible with all EF lenses which obviously are top notch. If you are looking to put a camera in a housing I would say steer clear of film, unfortunately. I've been there and it's a pain in the ass to get out every 36 frames when there are OTHER methods of modern photography that allow you to swim practically indefinitely.
That being said I have had some stuff run recently that I made with my Mamiya 7 and 80 f/4. The 150 for the M7 would be sweet but not tight enough unless you're shooting shorebreak or beachbreak…
Oh yeah, I am from Ventura too! If you see a scrubby looking guy at the beach with a mamiya 7 or olympus epic, say hi!