List of products by brand Optolong

Optolong is China's largest manufacturer of optical filters, with unique products, such as the L-Pro, with 5 pass bands located in regions of the visible spectrum where astronomical objects emit, but prevents stray light from passing through.
Optolong Optics Co. Ltd. is a manufacturer of astronomy filters, and other types of optical filters with applications in multiple industrial sectors. Located in Kunming City in China, their more than 20 years (since 1999) of experience in optics and multilayer coating technology of optical glasses allows them to design and produce filters with a combination of really sophisticated optical windows. Currently, Optolong is the first astronomical filter brand in China, with exclusive products. The L-Pro filter, which prevents the passage of artificial stray lights, has five pass bands, located in those regions of the visible spectrum where astronomical objects emit, and has received a highly positive response among amateur astronomers and astrophotographers.Optolong also manufactures other filters such as UHC, H-Beta, O-III, H-Alpha, SII, LRGB, Night Sky H-Alpha Less
Set of filters Optolong SHO...
Filters for astronomical telescopes
Optolong
Set of filters Optolong SHO narrow band in 36mm
OTLOG-SHO7-36
413.18 537.15 -123.97 VAT excl.
OPTOLONG narrow band filter set in 36mm without cell. These filters are non-threaded. The included filters are the H-alpha in 7nm, the OIII in 6.5nm and the SII in 6.5nm. The Hubble palette with one of the best performance on the market.
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OPTOLONG L-ULTIMATE Dual...
Narrow band filters for CCD cameras
Optolong
OPTOLONG L-ULTIMATE Dual 3nm 2" filter
OTLL-Ultimate2
258.64 VAT excl.
New 3nm dual OPTOLONG filter(H-Alpha, red and OIII, green-blue) designed to drastically reduce the effect of light pollution. It blocks light pollution, darkening the sky background. It also blocks artificial light from mercury vapor, high and low pressure sodium vapor, and unwanted daylight caused by neutral oxygen emission in our atmosphere
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Filter Optolong anti-light...
Filters for astronomical telescopes
Optolong
Filter Optolong anti-light pollution filter CLS EOS-FF
OTLOG-CLS-EOSPFCF
94.17 100.00 -5.83 VAT excl.
The CLS (City Light Suppression) broadband filter is designed to improve the visibility of deep space objects by selectively reducing transmission at wavelengths typical of polluting artificial lights (mercury vapor and high and low pressure sodium lamps) and also natural light caused by the emission of neutral oxygen in the atmosphere (skyglow).
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Filter set Optolong SHO 3nm...
Narrow band filters for CCD cameras
Optolong
Filter set Optolong SHO 3nm narrow band in 2"
OTLSHO3
876.00 908.26 -32.26 VAT excl.
The Optolong SHO-3nm filter kit includes the SII 3nm, H-Alpha 3nm and OIII 3nm narrowband filters, which generally work with astronomy-specific cooled monochrome cameras and modified DSLRs. Corresponding to the RGB channel (HA, OIII, SII), photographers can process the images with the Hubble palette using astronomical post-processing software.
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Set of filters Optolong SHO...
Narrow band filters for CCD cameras
Optolong
Set of filters Optolong SHO 3nm narrow band in 36mm
OTLSHO3-36
661.12 908.26 -247.15 VAT excl.
The Optolong SHO-3nm filter kit includes the SII 3nm, H-Alpha 3nm and OIII 3nm narrowband filters, which generally work with astronomy-specific cooled monochrome cameras and modified DSLRs. Corresponding to the RGB channel (HA, OIII, SII), photographers can process the images with the Hubble palette using astronomical post-processing software.
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Filter Optolong anti-light...
Filters for astronomical telescopes
Optolong
Filter Optolong anti-light pollution CLS-CCD 2"
OTLOG-CLS-CCD200
128.88 139.00 -10.12 VAT excl.
The CLS-CCD broadband filter is designed to improve the visibility of deep space objects in astrophotography by selectively reducing transmission in the wavelengths of polluting artificial lights (mercury vapor and high and low pressure sodium lamps) and also natural light caused by the emission of neutral oxygen in our atmosphere (skyglow).
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L-PRO Filter Optolong Clip...
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Optolong
L-PRO Filter Optolong Clip Canon EOS-R
OTLOG-LPRO-EOS-R
212.36 VAT excl.
A filter against visual and photographic light pollution 95% transmission Premium Schott optical glass 380 to 750 nm bandwidth For attachment to the sensor of Canon EOS-R cameras
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Filter Optolong H-Beta 25nm...
Filters for astronomical telescopes
Optolong
Filter Optolong H-Beta 25nm 1.25" H-Beta 25nm 1.25" filter
OTLOG-HB25-125
74.34 82.60 -8.26 VAT excl.
The Optolong H-beta filter is designed for visual observation of nebulae, providing maximum contrast, even under high quality skies, allowing the Horsehead Nebula to be observed with large diameter telescopes (250 or 300 mm).
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Filter Optolong SII-CCD...
Filters for astronomical telescopes
Optolong
Filter Optolong SII-CCD from 6.5nm 1,25"
OTLOG-SIICCD65-125
128.89 137.15 -8.26 VAT excl.
The 6.5 nm narrow band SII filter is designed for specific astrophotography at the 672 nm wavelength. It can be used in combination with the OIII and H-Alpha filters to create "Hubble-like" images. By selectively reducing the transmitted wavelengths, this filter suppresses the effects of street lighting.
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Filter Optolong SII-CCD of...
Filters for astronomical telescopes
Optolong
Filter Optolong SII-CCD of 6.5nm 2"
OTLOG-SIICCD65-200
204.09 212.35 -8.26 VAT excl.
The 6.5 nm narrow band SII filter is designed for specific astrophotography at the 672 nm wavelength. It can be used in combination with the OIII and H-Alpha filters to create "Hubble-like" images. By selectively reducing the transmitted wavelengths, this filter suppresses the effects of street lighting.
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Filter Optolong L-eNhance...
Filters for astronomical telescopes
Optolong
Filter Optolong L-eNhance nebular clip-on filter for CANON EOS APS-C cameras
OTLOG-L-ENH-EOSCF
206.57 214.83 -8.26 VAT excl.
The L-eNhance filter is a dual bandpass filter that allows nebular photography with DSLR, CMOS/CCD color cameras. It significantly reduces light pollution allowing color cameras to achieve the quality of monochrome cameras with narrow band filters.
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Filter Optolong SII-CCD...
Filters for astronomical telescopes
Optolong
Filter Optolong SII-CCD from 6.5nm unmounted Ø 31 mm
OTLOG-SIICCD65-31C
155.33 163.59 -8.26 VAT excl.
The 6.5 nm narrow band SII filter is designed for specific astrophotography at the 672 nm wavelength. It can be used in combination with the OIII and H-Alpha filters to create "Hubble-like" images. By selectively reducing the transmitted wavelengths, this filter suppresses the effects of street lighting.
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Filter Optolong SII-CCD...
Filters for astronomical telescopes
Optolong
Filter Optolong SII-CCD from 6.5nm unmounted Ø 36 mm
OTLOG-SIICCD65-36C
160.29 168.55 -8.26 VAT excl.
The 6.5 nm narrow band SII filter is designed for specific astrophotography at the 672 nm wavelength. It can be used in combination with the OIII and H-Alpha filters to create "Hubble-like" images. By selectively reducing the transmitted wavelengths, this filter suppresses the effects of street lighting.
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Filter Optolong IR Pass 685...
Filters for astronomical telescopes
Optolong
Filter Optolong IR Pass 685 nm 1.25" IR Pass filter
OTLOG-IRP685-125
64.42 68.55 -4.13 VAT excl.
The Optolong IR-Pass filter is particularly suitable for planetary photography, as it eliminates the shortest wavelengths, obtaining a stabilizing effect on the image, greatly reducing the defects introduced by atmospheric turbulence.
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Filter Optolong IR Pass 685...
Filters for astronomical telescopes
Optolong
Filter Optolong IR Pass 685 nm 2"
OG-IRP685-200
96.65 100.78 -4.13 VAT excl.
The Optolong IR-Pass filter is particularly suitable for planetary photography, as it eliminates the shortest wavelengths, obtaining a stabilizing effect on the image, greatly reducing the defects introduced by atmospheric turbulence.
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Set of photometric filters...
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Optolong
Set of photometric filters OPTOLONG UBVRI 2"
OTLUBVRI200
656.98 VAT excl.
Set of 5 calibrated filters for scientific use. This is a fantastic alternative option to traditional manufacturers and with a more economical price: Filters for photometry Conforms to Johnson-Cousins standard Cell mounted filters with 50.8 mm thread (M48 thread)
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Filter set Optolong LRGB...
Filters for astronomical telescopes
Optolong
Filter set Optolong LRGB unmounted Ø 36 mm
OG-LRVB-36C
240.46 248.72 -8.26 VAT excl.
Set of filters Optolong LRGB calibrated for astrophotography with monochrome cameras that after subsequent assembly of the individual images allows to obtain the object with its true color.
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Filter Optolong anti-light...
Filters for astronomical telescopes
Optolong
Filter Optolong anti-light pollution filter CLS 1.25"
OTLOG-CLS125
45.41 48.00 -2.59 VAT excl.
The CLS (City Light Suppression) broadband filter is designed to improve the visibility of deep space objects by selectively reducing transmission at wavelengths typical of polluting artificial lights (mercury vapor and high and low pressure sodium lamps) and also natural light caused by the emission of neutral oxygen in the atmosphere (skyglow).
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Filter set Optolong LRGB...
Filters for astronomical telescopes
Optolong
Filter set Optolong LRGB unmounted Ø 31 mm
OTLOG-LRVB-31C
233.85 242.11 -8.26 VAT excl.
Set of filters Optolong LRGB calibrated for astrophotography with monochrome cameras that after subsequent assembly of the individual images allows to obtain the object with its true color.
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Filter set Optolong LRGB 1,25"
Filters for astronomical telescopes
Optolong
Filter set Optolong LRGB 1,25"
OTLOG-LRVB-125
203.27 211.53 -8.26 VAT excl.
Set of filters Optolong LRGB calibrated for astrophotography with monochrome cameras that after subsequent assembly of the individual images allows to obtain the object with its true color.
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Filter Optolong anti-light...
Filters for astronomical telescopes
Optolong
Filter Optolong anti-light pollution filter CLS-CCD 1.25"
OTLOG-CLS-CCD125
77.64 84.00 -6.36 VAT excl.
The CLS-CCD broadband filter is designed to improve the visibility of deep space objects in astrophotography by selectively reducing transmission in the wavelengths of polluting artificial lights (mercury vapor and high and low pressure sodium lamps) and also natural light caused by the emission of neutral oxygen in our atmosphere (skyglow).
Stock at Supplier

Deliver it 20/27 days

Filter Optolong anti-light...
Filters for astronomical telescopes
Optolong
Filter Optolong anti-light pollution filter CLS-CCD EOS-C
OTLOG-CLSCCD-EOSCF
94.17 100.00 -5.83 VAT excl.
The CLS-CCD broadband filter is designed to improve the visibility of deep space objects in astrophotography by selectively reducing transmission in the wavelengths of polluting artificial lights (mercury vapor and high and low pressure sodium lamps) and also natural light caused by the emission of neutral oxygen in our atmosphere (skyglow).
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Filter Optolong H-A7...
Filters for astronomical telescopes
Optolong
Filter Optolong H-A7 (H-Alfa 7nm) 1.25"
OTLOG-HA7-125
142.93 153.00 -10.07 VAT excl.
This narrow band filter offered by Telescopiomania is able to isolate the H-alpha line (656nm) of the visible spectrum, making it an effective barrier against stray light and is especially suitable for close study of the details of emission nebulae, providing high contrast and dramatically accentuating the details of this type of celestial objects.
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Filter Optolong H-A7...
Filters for astronomical telescopes
Optolong
Filter Optolong H-A7 (H-Alpha 7nm) EOS-C
OTL11305
191.00 VAT excl.
This narrow band filter offered by Telescopiomania is able to isolate the H-alpha line (656nm) of the visible spectrum, making it an effective barrier against stray light and is especially suitable for close study of the details of emission nebulae, providing high contrast and dramatically accentuating the details of this type of celestial objects.
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