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NiSi 77mm Natural Night Filter

BH #NIRNGT77 • MFR #NIR-NGT-77
NiSi
NiSi 77mm Natural Night Filter
Key Features
  • Reduces Light Pollution in Night Sky
  • Blocks Yellow Sodium-Vapor Light
  • Blocks Yellow Mercury-Vapor Light
  • Blocks Yellow Light from Low CRI LEDs
The 77mm Natural Night Filter from NiSiis 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.
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NiSi NIR-NGT-77 Overview

The 77mm Natural Night Filter from NiSiis 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 skyglow, 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 NiSi 77mm Natural Night Filter can improve the results of nighttime images by blocking the yellow light from sodium-vapor lamps, mercury-vapor lamps, or low Color Rendering Index LEDs, 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.

This NiSi 77mm Natural Night Filter is constructed from optical glass for clarity as well as color fidelity. Each glass surface includes nano coating for reduced glare and improved color transmission. The nano coating also incorporates resistance coating for an improved beading effect with water or oil for easier cleaning, plus resistance to scratches and abrasions.

  • Reduces the appearance of light pollution in images or video that include the night sky and illumination from artificial light sources
  • For cameras with daylight film installed, or a digital camera system with its daylight white balance setting selected
  • Blocks the yellow light from sodium-vapor lamps, mercury-vapor lamps, or low Color Rendering Index LEDs, 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
  • Approximately 2x filter factor reduces exposure by 1 stop
  • Constructed from optical glass for clarity
  • Each glass surface includes nano coating for improved light transmission
  • Resistance coating for improved beading with water or oil for easy cleaning
  • Resists scratches and abrasions
  • Aluminum-alloy filter ring for durability while remaining lightweight
  • 77mm front filter threads allow for use with other filters
  • Plastic case included for storage and transport

NiSi NIR-NGT-77 Specs

Filter TypeLight Pollution
Filter Factor2x (1-Stop)
Circular Size77 mm Filter Thread
Front Accessory Thread / Bayonet77 mm
CoatingsMulti-Coating, Resistance Coating
Filter MaterialGlass
Packaging Info
Package Weight0.235 lb
Box Dimensions (LxWxH)4.45 x 4.35 x 0.8"

NiSi NIR-NGT-77 Reviews

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