Optolong Clear Sky Clip Filter for Nikon-Z Cameras

The Optolong Clear Sky Nikon Z Clip-In Filter is designed to provide a very gentle filtering profile that blocks sodium and mercury lamp wavelengths (commonly emitted by street lamps). This filter shines the brightest in Milky Way photography setups and under skies that are 4 or lower on the Bortle light pollution scale.

It can also shoot city night scenes. 

Please Note: Light pollution filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.

Coating Technology

• Multi-layers anti-reflection coating
• Non-cementing optical substrate coating
• Optolong L-Pro filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.
• Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.

Specifications

• Filter Style: Clip-In
• Compatible Cameras: Z5, Z6, Z6II, Z7, Z7II, Z8, Z9, ZF
• Compatible Lenses: All F Series Main Lenses, Auxiliary Lenses w/ Appropriate Adapter (Lens Adapter Not Included)

Please Note: There may be slight vignetting when using this clip-in filter.

Optolong Clear Sky Filter Performance

I. The Milky Way on the land of snow, imaged by 拂晓_718 (China)

Camera：Canon 5DS modified
Lens：Canon 35mm f/1.4 II
Filter：Optolong Clear Sky
Sky: f2.8 240s iso640
Land: f2.8 90s iso2000

II. Milk Way by Yuri Beletsky who used Optolong Clear Sky

III. Stone Forest under the Milk Way by Yule俞乐

Stone Grotoes 

by Optolong Clear Sky 

IV. Summer Milky Way at Cameron Highlands, imaged and processed by Sammax Chong (Malaysia)

Nikon D750,Samyang FishEye 12mm 

Optolong Clear Sky filter

ISO1600,30s,F2.8, 

8stacked

About Optolong

While Optolong is a relative newcomer to the astronomy industry, they are no strangers to optics and filters. Optolong is a division of Yulong Optics Company, a high tech company specializing in optical filter design and production. Their products include bandpass filters, flourescence filters, edge filters, longpass and shortpass filters, beam splitters, anti-reflection coatings, optical mirrors and, of course, astronomical filters.

Established in 1999 and based in Kunming City, China, Optolong/Yulong provides nearly 2000 types of optical filter coatings annually to customers worldwide in a wide variety of industries and applications.