: Nuances Clearsky Light Pollution Filter - 72mm : Camera & Photo. : Nuances Clearsky Light Pollution Filter - 72mm : Camera & Photo. Reduces Light Pollution in Night Sky 。 Absorbs Yellow Sodium-Vapor Light 。 Absorbs Yellow Mercury-Vapor Light 。 1.5x Filter Factor, +0.6 Stop 。 Multi-coating prevents internal ghosting and reflections; is oil, dust, dirt, as well as scratch resistant; and provides an improved beading effect with water for more efficient cleaning 。 The Cokin 7mm NUANCES Clearsky Filter is designed to reduce the appearance of light pollution in images or video that include the night sky and illumination from artificial light sources. This effect can be obtained when this filter is used on a film camera system with daylight film installed or on a digital camera system with its daylight white balance setting selected. Light pollution occurs in areas of the night sky that are above or near concentrated and intense sources of artificial light such as cities. These light sources can include exterior and interior lamps for commercial or residential buildings, brightly lit advertisements such as billboards, streetlamps, as well as sports and entertainment venues. Together they can result in a type of light pollution known as sky glow, where individual stars, the Milky Way, and other astronomical features in the night sky are obscured. Additionally, artificial lights clustered together can become difficult to individually discern. Light pollution from these "cluttered" sources can become a source of distraction within an image and can resemble overexposed areas of glare. 。 。 。
72mm Nuances Clearsky Light Pollution Filter
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