Hoya Y1SKYL055 55mm Sky Filter

The Hoya Y1SKYL055 55mm Sky Filter is a straightforward optical accessory designed to serve two practical purposes for photographers. As a skylight-type filter, it absorbs a portion of ultraviolet light and reduces the slight blue color cast that can appear in outdoor images — particularly in open shade, at high altitudes, or on overcast days. The result is subtly warmer tones and improved color accuracy, especially visible in skin tones and landscape scenes where excessive blue can flatten the image's appearance.

Beyond its corrective function, this filter is widely used as a permanent lens protector. Mounting it on the front of a 55mm-threaded lens creates a sacrificial barrier against dust, fingerprints, moisture, and minor impacts that might otherwise damage the lens's front element. Because sky filters have minimal impact on exposure and color balance, they can remain attached during virtually all shooting conditions without requiring adjustment. At 55mm, this filter fits a range of popular lenses from brands including Nikon, Sony, Canon, and others that use the standard 55mm thread size.