Due to its light pink color, the B&W 77 mm KR 1.5 Slim Skylight filter reduces the blue cast of daylight and produces a pleasing, warmer picture tone. Also known as a Skylight (1A) filter, it is a wise initial investment. It can help protect your lens from dust, moisture and scratches, which can lead to costly repairs.
B&W slim filters are for wide-angle lenses and are 3mm thick. They do not have a front thread.