Due to its light pink color, the B&W 49 mm KR 1.5 Extra Wide 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 Extra-Wide's are special filters for wide-angle lenses. In order to prevent vignetting, the accessory thread on the front is larger