OPTICAL LENS - FOCUS
Tired of not being able to see well underwater? Can't read your computer or gauges? Maybe you not sure what F-Stop you are setting your camera on? If these are problems for you when diving you need to get a set of optical lenses for your dive mask.
See things clearly underwater with these Cressi Negative Diopter lenses, for your Cressi Focus Mask. Easy to install and WOW! You can now see everything better than before. Lenses are made of tempered glass and are available from -1.0 to -8.0 in 0.5 Diopter increments for left or right-side lens.