Cracking lenses
This will sound sad. I have a pair of turbines and valves in the prism blue lense. They are absolutely superb. I use them on the water both in the UK and overseas. The clarity and lack of eye fatigue are excellent. The quality of the optics will allow you to see clearly both on the water line and below. I cannot recommend these enough. I have two pairs to keep on spare in my boat grab bag in case I lose a pair.