Aurora-Aperture Adapter Mount Format PowerDusk Filter for Sigma MC-21 Lens Mount Adapter

BH #AUPDKMC21 • MFR #PDK-MC21
Aurora-Aperture Adapter Mount Format PowerDusk Filter for Sigma MC-21 Lens Mount Adapter
Key Features
  • Snap-In Night Sky Light Pollution Filter
  • Absorbs Yellow Sodium-Vapor Light
  • Absorbs Mercury-Vapor Light
  • Multi-Coated Glass Construction
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This Adapter Mount Format PowerDusk Filter for Sigma MC-21 Lens Mount Adapter from Aurora Aperture 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. This filter is mounted within a durable aluminum alloy filter frame that is made specifically to fit within a separately available Sigma MC-21 Lens Mount Adapter. By mounting an Aurora Aperture Adapter Mount Format Filter inside a compatible lens mount adapter, that filter can be used for multiple lenses even if those lenses have differing or nonexistent front filter threads.
In Stock
$59.95

Aurora-Aperture PDK-MC21 Overview

This Adapter Mount Format PowerDusk Filter for Sigma MC-21 Lens Mount Adapter from Aurora Aperture 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. This filter is mounted within a durable aluminum alloy filter frame that is made specifically to fit within a separately available Sigma MC-21 Lens Mount Adapter. By mounting an Aurora Aperture Adapter Mount Format Filter inside a compatible lens mount adapter, that filter can be used for multiple lenses even if those lenses have differing or nonexistent front filter threads.

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.

When used, the Adapter Mount Format PowerDusk Filter for Sigma MC-21 Lens Mount Adapter can improve the results of nighttime images by absorbing the yellow light from sodium-vapor lamps or mercury-vapor lamps, common light sources within urban areas. By preventing the dominant wavelengths of light associated with the color of those lamps from being recorded, the visibility of astronomical objects is enhanced, and artificial light sources are more clearly defined with less glare and improved contrast.

Constructed from optical-quality neodymium glass for increased optical clarity as well as color fidelity, each of this filter's glass surfaces is multi-coated to prevent ghosting as well as reflections. The nano coating associated with the Adapter Mount Format PowerDusk Filter for Sigma MC-21 Lens Mount Adapter provides an additional layer that allows for more efficient cleaning when its surfaces come in contact with dust, dirt, water, or oil.

  • Compatible with separately available Sigma MC-21 Lens Mount Adapter
  • Snap-in filter reduces the appearance of light pollution in video or images that include the night sky and minimizes illumination from artificial light sources
  • For cameras with daylight film installed or a digital camera system with its daylight white balance setting selected
  • Absorbs the yellow light from sodium-vapor lamps or mercury-vapor lamps, common light sources within urban areas
  • Enhances the visibility of astronomical objects and, where they appear, artificial light sources are more clearly defined with less glare and improved contrast
  • Constructed from optical-quality neodymium glass for clarity as well as color fidelity
  • Multi-coated to prevent ghosting as well as reflections
  • Nano coating allows for more efficient cleaning when the filter's surfaces come in contact with dust, dirt, water, or oil
  • Durable aluminum alloy filter frame
UPC: 742880251249

Aurora-Aperture PDK-MC21 Specs

Filter TypeLight Pollution
CoatingsMulti-Coating
Filter MaterialGlass
Packaging Info
Package Weight0.105 lb
Box Dimensions (LxWxH)3.45 x 3.4 x 0.85"
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