The 37mm PowerUV Protector Filter from Aurora Aperture is a general-use, clear filter designed to block ultraviolet light and reduce the bluish cast of daylight. Aside from the reduction of unwanted blue casts, no additional coloration or contrast is created, and adjustments to exposure are not required while using this filter. When the 37mm PowerUV Protector Filter is applied, 50% of ultraviolet light waves are blocked at 380 nanometers, before which they are progressively eliminated, helping to limit the light that enters a camera to the visible spectrum. The appearance of blue casts that can occur while recording video or still photos under daylight that also features ultraviolet light is reduced, preserving color accuracy throughout the frame.