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SVBONY Telescope Filter 2 inches CLS Filter City Light Pollution Reduction Filter Broadband Filter Suitable for Deep Sky Visual Astronomical Photography

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$52.99

$ 23 .99 $23.99

In Stock

1.Size:2inch


About this item

  • Evaporation with 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
  • 90% transmission of main nebula emission lines;such as Ha 656nm;OIII 496nm;500nm;SII672nm and H-beta 486nm
  • 0.1% transmission of off-band;specifically the major emission lines of artificial light pollution;such as Na 589nm;Hg 435nmand 578nm
  • Suitable for color CCD cameras and unmodified DSLR Urban optical filter can effectively suppress urban harmful light and improve the contrast of shooting target



4.3 out of 5 stars Best Sellers Rank
  • #18 in Telescope Filters
Is Discontinued By Manufacturer No Date First Available January 26, 2018 Manufacturer SVBONY Country of Origin China

Product Description

City Light Suppression Light Pollution Broadband Filter

Telescope Filter

Suitable for Visual & Astronomical Photography

City Light Suppression Light Pollution Broadband Filter Features:

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

2. The CLS broadband filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants. Specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).

3. Ultra-thin filter cell minimize vignetting by maximize possible.

4. 90% transmission of main nebula emission lines (i.e. Ha 656nm, OIII 496nm&500nm, SII672nm and H-beta 486nm).

5. 0.1% transmission of off-band, specifically the major emission lines of artificial light pollution (i.e. Na 589nm, Hg 435nmand 578nm).

6. Suitable for color CCD cameras and unmodified DSLRs.

7. CLS filter with wider pass-band than UHC filter and hence is more favored when observing under mild to moderate light pollution.

8. 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.

9. WARNING: The filters of SVBONY are not designed for sun observation. DO NOT LOOK AT THE SUN WITH SVBONY FILTER. You would be BLIND if you fail to observe the warning.

CLS Filters Allow More Light Through

The 2" CLS filter is unbeatable for revealing nebulosity.

For get superb views of the M42, Lagoon, Swan and other extended nebulae.

The strictest quality control standards are employed throughout the production process.

The way an CLS filter works is very simple. It filters out the brightening of the sky due to artificial light. As many celestial objects, such as nebulae, radiate at other wavelengths, a considerable increase in contrast can be achieved by this.

The background sky appears darker and, all at once, faint details become visible.

2 inches CLS Filter

City Light Suppression Broadband Filter

Visual Astronomical Photography

Multi-layers anti-reflection coating

Electron-beam gun evaporation with 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.

  2 inches CLS Filter

The CLS filter can be used with all 2" eyepieces

2" thread - fits into virtually any 2" eyepiece.

 Visual Astronomical Photography

The CLS broadband filter produces exceptionally sharp images

The CLS filter is also a real plus when used for astrophotography. It allows successful deep sky photography even from within light-polluted cities.

It can be used not only for celestial observations but also for astrophotography.

Specifications

Type: City Light Suppression Filter (CLS Filter)
Material: Optical glass lens, Aluminum Frame
Shape: Round
Thread: Standard M48*0.75mm
Net Weight: 5.2g / 0.18oz

Alexander E.
Reviewed in the United States on February 14, 2025
No point of comparison! But it fits and arrived unbroken
Rolando F
Reviewed in the United States on September 7, 2024
It helps reduce light pollution. I recommend it.Thanks Kelly from Svbony customer services for recommend it.
Robert N peifer
Reviewed in the United States on July 2, 2024
This wad purchased in a bundle and while I haven't had much time to really give a in depth evaluation it seems to be a good build quality and does seem to boost contrast
Xavier
Reviewed in the United States on March 2, 2024
If you took off the ir blocking filter on you dslr you can use this and it should help bring it back for regular photography. Also great for night landscape photography where there are city light.And for astrophotography it is great too but...Make sure you take your pictures without this first so you can get a star profile to add to your nebulous or galaxies because this tends to put halos in the bigger stars.Other then that this is perfect for the polition of light taking over our great night sky's.
Dean Koepke
Reviewed in the United States on February 14, 2024
This filter does a good job of darkening the sky-glow from light pollution without much darkening of the target to be viewed. It is not a UHC dichroic type filter...nor does it darken either the sky glow or the target to be viewed as much. It desired effect is nonetheless still noticeable and beneficial.
GizemSivrikaya
Reviewed in Canada on December 8, 2024
It had a huge impact on the colors in the photo. It's very easy to use, and it made even colors that are invisible to the naked eye visible in the photo.
Tiffani
Reviewed in the United States on December 30, 2024
Unfortunately I have not been able to use it due to the weather where I live but it seems to be very good quality! Better than the filters that came with the Celtic Bird set, excited to use this filter!
Sierraman
Reviewed in the United States on November 21, 2024
I live in the suburbs of a big city at the edge of some farming areas under 5-6 bortle skies. I decided to purchase a filter to cut some of the light pollution in the sky so bought SVBONY CLS filter for my Seestar S50 telescope. I used the filter to photograph star clusters, galaxies, and nebulae. It worked ok for star clusters and galaxies, but for nebulae, it simply could not cut enough pollution to make them pop hence I could not notice any benefit to using them, I eventually came to realize that for nebulae, one would need a dual band filter!!!
Kindle Customer
Reviewed in Canada on June 19, 2023
It works great for the job. Of shooting the night sky.
WhatDadThinks
Reviewed in the United States on March 4, 2023
Let face it we are not NASA. Don’t need to spend every dime on the top of the line things unless u want to for a status symbol . This will serve you well under moderate light pollution I live in a bottle 6 skies and it gets rid of almost all of it. If you haven’t tried svbony before give them a chance. For being a “budget” brand they are really cranking out some high quality things over there. Keep it up
JG
Reviewed in Mexico on December 21, 2023
Buen filtro de luces de ciudad (no las led) pero si con las amarillas de mercurio.
Stv
Reviewed in Canada on April 16, 2021
Fast shipping. Arrived 2-3 days before estimated delivery date.👍🏾Perfect fit for my Canon T3i (see picture). I Did not had to adjust the little brackets. I just slipped in and it fits.😊Do not forget that this can be paired with EF lens. Lends with the red dot (see 2nd picture).Next step is to test it. See if it holds well into the cam and it's overall performance.If only the weather would cooperate.Good service.