B&W 49mm Ultraviolet (UV) Glass Filter are wise initial investments. They help protect your valuable investment from dust, moisture and scratches, which can lead to costly repairs.
This UV filter blocks the invisible UV component of light from the sky which can cause blur and to which many color films react with a blue cast. Because the glass is colorless, color rendition is not altered, aside from the elimination of the unwanted blue cast. No increase in exposure is required.
• B&W filters provide additional benefits of correction for Ultraviolet(UV) light which can register on film and videotape as a bluish cast and can obscure distant details
• If desired they can be left on the lens at all times for protection
• Ultraviolet filters allow you to correct for the UV effect to varying degrees
• UV filters are ideal for high altitude photography, by the sea and in regions with very clean air