Full spectrum colours exist at great depths underwater, but the hues become distorted when seen by the human eye. This colour-shift is due to the increased density of water and its natural filtering of light, which alters the wavelength of light as it passes through. The deeper the water, the greater the colour shift. As you descend, reds, oranges and yellows are quickly lost from the visible spectrum. If you dive in green water, that is water where you will not find coral reefs ( eg. the Mediterranean or Atlantic ) you will benefit from a yellow tint, whereas if you dive in cyan / blue water ( ie. tropical ) you will need a magenta tint.
Magenta tints or filters are designed for use in waters where colors are more rich and vibrant. By using this filter divers have the opportunity to experience the colors of the underwater world that are often lost at depth. The magenta filters out blue wavelengths in the water, allowing your eyes to see the brilliant reds, oranges, yellows, greens and violets. The lenses are only available in high-quality composite hard resin material (CR-39) which makes them stronger than normal glass lenses and much more efficient.
Yellow is used in low-light situations such as lakes, quarries, caves, rivers, and night dives. Anyone diving in the North Atlantic or Pacific will benefit from using a yellow tint or filter to help to optimize available light and improve visibility.
Tinted lenses are only available in plastics CR39, which somewhat limits mask choice at the present time. We can currently supply magenta and high-contrast yellow lenses for the Seavision Ultra2200 , Sea Shadow 2500 and Seavision 2000 series masks.
We are also pleased to offer the Seavision Chameleon System, a unique design allowing coloured filters to be clipped to the front of the Seavision 2000 mask.The Chameleon system delivers versatility for users through two uniquely designed mask shields. The Color Correcting Filter (magenta) shield is designed for use in warmer waters where colors are more rich and vibrant. By using the color correcting filters, users will have the opportunity to better experience the colors of the underwater world that are often lost at depth. The MaxSeaVisionT Filter (yellow) shield is for use in low light situations. Technical divers, cave divers and those diving in turbid waters around the world will benefit from this shield which helps to optimize available light and help improve visibility at the same time.
The choice of coatings currently available for dive masks is somewhat limited. However, optical technology is going through some exciting changes and, being professionals, we are constantly monitoring all the latest developments and improvements in order to maintain our commitment to bring you the very best means of achieving optimum underwater vision. Coatings currently available are:
No material is totally scratch-proof. However, a coated lens can reduce the incidence of scratching and reduce glare.
Resists water adhering to the lens surface and improves 'run-off' to help maintain clear vision.
Combined with a well-ventilated goggle, a hydrophobic coating on the inside of the lens will absorb moisture before it forms a layer of 'fog'.
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