Compatible: Support with original UV filter lens cover. Function: Red filter is suitable for 5 to 20 m underwater; Red filter: used for color correction in seawater diving photography and restoring the red absorbed by water. Features - Color: Red - Material: Aluminium alloy and glass - Size: 10x6x2cm - High transparency, high color reproduction, more exciting photos. Waterproof and scratch resistant, effectively protecting the lens. - Choose professional optical glass lens and excellent lens grinding process to make the clearer. - The multi-layered glass block prevents the harmful effects of UV rays and eliminates smog, correcting the chromatic aberration in the landscape photo. - Professional color correction for blue and tropical water, red filter is suitable for diving at depth of 16-68ft to supplement the red color absorbed by seawater. - Warm Tip: Dear buyer, Due to lighting effect,monitor's brightness,manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. sincerely hope that you can understand