I went freediving today and we all wore spheras. Our target dives were over 30meters. Mine was the shallowest at 35meters(115feet), but one of my buddies did a dive to 46meters(151feet).
Low volume plastic lenses are the way to go for freediving in my opinion. They compress with the pressure and therefore you need less air to equalize. Thats a huge benefit when you only have the air you bring down in your lungs. One disadvantage of a plastic curved mask is that your periferal vision is a little distorted. Not a big deal if you are just freediving, but I have heard some spearos complain about it.
I'm gonna order that Raven mask and give it a try (I'll give the snorkel to one of my kids). It looks like a one piece lens. The sphera has two lenses. One of mine fell out today. It has seen better days. Good thing I brought a spare.
|
