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home > Svbony 1.25" or 2" or EOS-C CLS Filter > Svbony 1.25" or 2" or EOS-C CLS Filter

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Svbony 1.25" or 2" or EOS-C CLS FilterProduct Description. The SVBONY city light suppression broadband filter is designed to improve the visibility of various deepsky objects at sub rural area. By selectively screening out of some of the background sky glow, the contrast is increased and allows deep sky objects to stand out against the background. It can be used not only for astronomical observations but for astronomical photography. Spectral Curve The Major Emission Lines of Nebulae: H

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Product Description.

The SVBONY city light suppression broadband filter is designed to improve the visibility of various deepsky objects at sub-rural area.

By selectively screening out of some of the background sky glow, the contrast is increased and allows deep sky objects to stand out against the background. It can be used not only for astronomical observations but for astronomical photography.

Spectral Curve

The Major Emission Lines of Nebulae:H-β486.1nm OIII 495.9nm OIII 500.7nm H-α 656.3nm

The Major Emission Lines of Artificial Light Pollution:Hg 435.8nm 546.1nm 577nm 578.1nm;Na 598nm 589.6nm 615.4nm 616.1nm

95% transmission of main nebula emission lines

0.1% transmission of off-band, specifically the major emission lines of artificial light pollution

Transmission of 0.1% is equivalent to OD3(Optical Density), and a high optical density value indicates very low transmission, and low optical density indicates high transmission.

Increases the contrast and image sharpness

--Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and optical density of off-band.

--Multi-layers anti-reflection coating can reduce the reflection and enhance the transmission of lights ;

--Ultra-thin filter cell minimize vignetting by maximize possible(clear aperture is 45mm for 2”);

--Electron-beam gun evaporation with Ion-assisted deposition coating technology (IAD) increase the stability of CWL (central wavelength) , no deviation affected by temperature change.

Durable

--Electron-beam gun evaporation with Ion-assisted deposition coating technology for durability and resistance to scratching.

--the package box is plastic pp-case with high density sponge carton lining ,which makes the filter portable and easy storage

Package Includes:

1xSvbony 2inch CLS Filter 1xSturdy Plastic Case

Specifications:

Brand: Svbony

Type: City Light Suppression Filter (CLS Filter)

Material: Optical glass lens, Aluminum Frame

Thread: Standard M48x0.75mm

Net Weight: 5.2g / 0.18oz

Svbony 1.25" or 2" or EOS-C CLS Filter

Name: Svbony 1.25" or 2" or EOS-C CLS Filter
Brand: muk-zwingenberg.de
SKU: 82866763099
Price: 30.95 USD
Availability: InStock
Rating: 4.1746 (2268 reviews)