CLS filters are broadband filters, which means they allow wide incident light wavelength ranges to pass through. They block light only in selected sections of the spectrum. These blocked sections are chosen in such a way that they coincide with the emissions from artificial light sources. In addition to artificial sources, there are also natural sky brightness phenomena, which are also blocked by CLS filters. Ultimately, the sky background appears darker with a CLS filter. The object being observed stands out more clearly against the background.
Omegon
Filters Pro 2'' CLS filter
$ 99.00
ready for shipping in 24
h
Omegon
Filters Nebula/ city light filter 1.25 ''
( 3.5 / 5 )
$ 39.90
ready for shipping in 24
h
Omegon
Filters Light Pollution Filter, 2”
( 3.33 / 5 )
$ 59.00
ready for shipping in 24
h
Omegon
Filters 1.25'' deep sky filter
$ 89.00
ready for shipping in 24
h
Omegon
Filters Pro Nebula CLS Deep Sky Filter 1,25''
$ 69.00
ready for shipping in 24
h
Omegon
Filters 1.25'' Clear Sky filter
$ 129.00
ready for shipping in 24
h
Optolong
Filters L-Pro 1.25''
Our price:
RRP:
$ 173.00
$ 140.00
ready for shipping in 24
h
Optolong
Filters Clip Filter for Canon EOS APS-C CLS
Our price:
RRP:
$ 108.00
$ 86.00
ready for shipping in 24
h
Optolong
Filters L-Pro 2''
Our price:
RRP:
$ 227.00
$ 195.00
ready for shipping in 24
h
Optolong
Filters Filter L-eNhance 1.25
Our price:
RRP:
$ 205.00
$ 190.00
ready for shipping in 24
h
Optolong
Filters Clear Sky Filter 82mm
$ 238.00
ready for shipping in 3-5
weeks
Optolong
Filters Clear Sky Filter 77mm
$ 184.00
ready for shipping in 24
h
Optolong
Filters Clip Filter for Canon EOS FF L-Pro
( 5 / 5 )
RRP:
$ 379.00
Our price:
RRP:
$ 379.00
$ 259.00
ready for shipping in 24
h
STC
Filters Astro Multispectra Filter 2"
$ 379.00
ready for shipping in 24
h
Chroma
Filters LoGlow Light Pollution 1.25"
$ 550.00
ready for shipping in 3-5
weeks
Optolong
Filters Clip Filter for Canon EOS APS-C CLS-CCD
Our price:
RRP:
$ 140.00
$ 105.00
ready for shipping in 24
h
Chroma
Filters LoGlow Light Pollution 2"
$ 960.00
ready for shipping in 24
h
Astronomik
Filters CLS Clip Nikon Z XL
$ 216.00
ready for shipping in 24
h
IDAS
Filters Night Glow Suppression Canon EOS APS-C
Our price:
RRP:
$ 390.00
$ 357.00
ready for shipping in 3-5
weeks
Astronomik
Filters CLS CCD 50mm
$ 249.00
ready for shipping in 3-7
days
Vaonis
Filters CLS Filter for VESPERA
$ 249.00
ready for shipping in 24
h
Astronomik
Filters CLC Canon EOS clip filter APS-C
$ 140.00
ready for shipping in 24
h
Optolong
Filters L-Ultimate 2"
Our price:
RRP:
$ 433.00
$ 418.00
ready for shipping in 24
h
Optolong
Filters L-Quad Enhance 2"
$ 260.00
ready for shipping in 3-5
weeks
Astronomik
Filters CLS Canon EOS XL Clip
$ 195.00
ready for shipping in 24
h
Explore Scientific
Filters 2" CLS filter
$ 91.00
ready for shipping in 24
h
Optolong
Filters L-Ultimate 1,25"
$ 281.00
ready for shipping in 24
h
Astronomik
Filters 2" CLS CCD filter
$ 249.00
ready for shipping in 24
h
Optolong
Filters L-Pro Filter 77mm
Our price:
RRP:
$ 390.00
$ 312.00
ready for shipping in 24
h
Astronomik
Filters CLS Canon EOS M Clip filter
$ 151.00
ready for shipping in 3-7
days
Astronomik
Filters CLS CCD XL Clip Canon EOS R
$ 271.00
ready for shipping in 24
h
Optolong
Filters L-Pro Clip Sony Full Frame V2
$ 260.00
Product can be shipped as of 01.06.2024
Explore Scientific
Filters 1.25" CLS filter
$ 63.00
ready for shipping in 1-2
weeks
Astronomik
Filters 1.25" CLS CCD filter
$ 108.00
ready for shipping in 24
h
Astronomik
Filters CLS Sony Alpha Clip filter
$ 216.00
ready for shipping in 3-7
days
Astronomik
Filters CLS XL Clip Canon EOS R
$ 216.00
ready for shipping in 3-7
days
Astronomik
Filters CLS CCD EOS clip filter
$ 173.00
ready for shipping in 24
h
Astronomik
Filters CLS Nikon XL Clip
$ 216.00
ready for shipping in 3-7
days
Astronomik
Filters CLS M52
$ 205.00
ready for shipping in 3-7
days
Astronomik
Filters CLS Clip Pentax K
$ 216.00
ready for shipping in 3-7
days
Astronomik
Filters CLS XT Clip Canon EOS APS-C
$ 162.00
ready for shipping in 24
h
Celestron
Filters LPS RASA 800
Sale price:
$ 550.00
$ 432.68
ready for shipping in 24
h
Astronomik
Filters CLS CCD EOS M Clip filter
$ 173.00
ready for shipping in 24
h
Astronomik
Filters CLS CCD M49
$ 249.00
ready for shipping in 3-7
days
Astronomik
Filters CLS CCD M52
$ 260.00
ready for shipping in 3-7
days
Astronomik
Filters CLS CCD M55
$ 550.00
ready for shipping in 3-7
days
Astronomik
Filters CLS CCD M58
$ 550.00
ready for shipping in 3-7
days
Astronomik
Filters CLS CCD M62
$ 570.00
ready for shipping in 3-7
days
STC
Filters Astro Nightscape Clip Filter Sony
$ 184.00
ready for shipping in 1-2
weeks
Astronomik
Filters CLS CCD M67
$ 580.00
ready for shipping in 3-7
days
Astronomik
Filters CLS CCD M77
$ 580.00
ready for shipping in 3-7
days
Hutech Astro
Filters Sightron LPS-C1 2"
$ 227.00
ready for shipping in 3-5
weeks
IDAS
Filters LPS-D3 Drop-In Canon EF FullFrame
$ 433.00
ready for shipping in 3-5
weeks
Astronomik
Filters CLS CCD M72
$ 580.00
ready for shipping in 3-7
days
Chroma
Filters LoGlow Light Pollution 36mm
$ 429.00
ready for shipping in 3-5
weeks
Astronomik
Filters CLS CCD 42mm, ungefasst
$ 173.00
ready for shipping in 3-7
days
Astronomik
Filters CLS CCD Clip-Filter Pentax K
$ 271.00
ready for shipping in 3-7
days
Astronomik
Filters CLS CCD Clip Nikon XL
$ 260.00
ready for shipping in 3-7
days
Astronomik
Filters CLS M77
$ 422.00
ready for shipping in 3-7
days
Astronomik
Filters CLS CCD 27mm filter, unmounted
$ 108.00
ready for shipping in 3-7
days
Astronomik
Filters CLS CCD 31mm filter, mounted
$ 140.00
ready for shipping in 3-7
days
Astronomik
Filters CLS CCD 36mm filter, mounted
$ 151.00
ready for shipping in 3-7
days
Astronomik
Filters CLS 50x50mm filter, unmounted
$ 205.00
ready for shipping in 3-7
days
Astronomik
Filters CLS 31mm filter, mounted
$ 108.00
ready for shipping in 3-7
days
Astronomik
Filters CLS 36mm filter, mounted
$ 130.00
ready for shipping in 3-7
days
Astronomik
Filters CLS 50mm filter, mounted
$ 184.00
ready for shipping in 3-7
days
Astronomik
Filters SC CLS CCD filter
$ 271.00
ready for shipping in 3-7
days
Astronomik
Filters T2 CLS CCD filter
$ 205.00
ready for shipping in 3-7
days
Astronomik
Filters SC CLS filter
$ 205.00
ready for shipping in 3-7
days
Astronomik
Filters CLS filter, T2
$ 162.00
ready for shipping in 3-7
days
Astronomik
Filters CLS CCD 50x50mm filter, unmounted
$ 260.00
ready for shipping in 3-7
days
Astronomik
Filters CLS M49
$ 195.00
ready for shipping in 3-7
days
Astronomik
Filters CLS M72
$ 422.00
ready for shipping in 3-7
days
Astronomik
Filters CLS CCD Sony Alpha Clip filter
$ 260.00
ready for shipping in 3-7
days
Astronomik
Filters CLS M67
$ 422.00
ready for shipping in 3-7
days
IDAS
Filters Nebula Filter LPS-D2 for Canon EOS APS-C
$ 353.00
ready for shipping in 24
h
Astronomik
Filters CLS M62
$ 401.00
ready for shipping in 3-7
days
Astronomik
Filters CLS M58
$ 401.00
ready for shipping in 3-7
days
Astronomik
Filters CLS M55
$ 390.00
ready for shipping in 3-7
days
Astronomik
Filters CLS CCD clip filter for Canon EOS XL
$ 260.00
ready for shipping in 3-7
days
Optolong
Filters L-eNhance APS-C EOS Clip
( 3.5 / 5 )
RRP:
$ 292.00
Our price:
RRP:
$ 292.00
$ 281.00
ready for shipping in 24
h
Optolong
Filters L-eNhance 2"
( 5 / 5 )
$ 260.00
ready for shipping in 24
h
Astronomik
Filters CLS CCD XT Clip Canon EOS APS-C
$ 195.00
ready for shipping in 3-7
days
Astronomik
Filters 2" CLS filter
$ 184.00
ready for shipping in 3-7
days
Celestron
Filters CLS RASA Origin
$ 368.00
Product can be shipped as of 01.10.2024
Optolong
Filters L-Pro Canon EOS R Clip
Our price:
RRP:
$ 325.00
$ 260.00
ready for shipping in 24
h
Optolong
Filters L-Pro Clip Sony Full Frame
Our price:
RRP:
$ 303.00
$ 263.00
ready for shipping in 24
h
Astronomik
Filters 1.25" CLS filter
$ 86.00
ready for shipping in 24
h
Optolong
Filters Clip Filter for Canon EOS FF CLS
Our price:
RRP:
$ 140.00
$ 105.00
ready for shipping in 3-5
weeks
The figure below illustrates the principle using the example of the NGS1 filter from IDAS. The black transmission curve shows which wavelength ranges the filter allows to pass through. 100% would mean no filter effect at all. The transmission curve also shows which light wavelength ranges are blocked by the filter. These ranges are associated with the emissions from sodium-vapour lamps and other disruptive light sources. The CLS filter filters out this unwanted light.
The CLS filter allows broad ranges to pass through and is therefore also suitable for small optics.
