This filter is designed for diving fans who like taking photos and videos under water. Due to wave refraction， pictures taken underwater may suffer color distortion. Using this color correction filter， pictures taken under water will be more lively and natural.
Red: Used in the depth of water 10-20 metres， at noon ( when sun beat down upon the water )， smoke filters， to restoring red absorbed by water.

Note:
Waterproof case is not included in this product.

Main Features:
Color correction for tropical and blue green water scuba diving
Best suited for depths of 12 to 65 feet
Constructed using tough optically correct acrylic
Easy to install and remove
Dramatically improve underwater colors