Corona has been one of the most popular IST masks and its superior fitting and comfort are the reasons behind the success. Its swivel buckle allows the diver to adjust the mask to the most desirable position. The low internal volume gives unrestricted view.
● Optical lenses are available in diopter.
from -1.0 to -7.0 in -0.5 decrement
● Left / right lenses are interchangeable.
You can find the lenses for this mask here at the sweet price of $14.99 a lens !!