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
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 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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Set of filters Optolong SHO...
Filters for astronomical telescopes
Optolong
Set of filters Optolong SHO narrow band in 2"
OTLOG-SHO7-200
495.82 623.84 -128.02 VAT excl.
OPTOLONG narrow band filter set in 2". The included filters are the H-alpha at 7nm, the OIII at 6.5nm and the SII at 6.5nm. The Hubble palette with one of the best performance on the market.
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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 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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Planetary filter Optolong...
Filters for astronomical telescopes
Optolong
Planetary filter Optolong U-Venus 2"
OTLOG-UVENUS-200
206.57 214.83 -8.26 VAT excl.
The U-Venus filter allows to observe and obtain photographs, CCD images or video in the UV-A band (320-400 nm) and to observe the cloud structures of Venus.
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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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Fitro Optolong OIII 18nm 2"...
Filters for astronomical telescopes
Optolong
Fitro Optolong OIII 18nm 2" OIII 18nm 2" Fitro OIII 18nm 2"
OTLOG-OIII18-200
87.57 95.83 -8.26 VAT excl.
OIII narrow band filters are designed for the observation of nebulae emitting light of 500 nm wavelength. By selectively reducing transmission in the other wavelengths, they increase the contrast of nebulae and suppress the effects of street lighting, making them perfect for observing emission nebulae, planetary nebulae and supernova remnants.
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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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Skyglow Filter Optolong 1.25"
Filters for astronomical telescopes
Optolong
Skyglow Filter Optolong 1.25"
OTLOG-SKYGLOW-125
26.41 34.67 -8.26 VAT excl.
SKYGLOW Optolong interference filters designed to enhance deep sky observation in moderate light pollution conditions, blocking most wavelengths (skyglow and artificial light) that cause light pollution. In contrast, their transmission is maximal for H α and β, significantly increasing the contrast of nebulae, galaxies and star clusters.
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Planetary filter Optolong...
Filters for astronomical telescopes
Optolong
Planetary filter Optolong U-Venus 1.25" Planetary Filter
OTLOG-UVENUS-125
156.99 165.25 -8.26 VAT excl.
The U-Venus filter allows to observe and obtain photographs, CCD images or video in the UV-A band (320-400 nm) and to observe the cloud structures of Venus.
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Filter Optolong H-A7...
Filters for astronomical telescopes
Optolong
Filter Optolong H-A7 (H-Alpha 7nm) EOS APS-C Clip
OTOG-HA7-EOSCF
179.30 187.56 -8.26 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-Beta 25nm...
Filters for astronomical telescopes
Optolong
Filter Optolong H-Beta 25nm 2" H-Beta 25nm 2" filter
OTLOG-HB25-200
113.19 121.45 -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 UV-IR Cut...
Filters for astronomical telescopes
Optolong
Filter Optolong UV-IR Cut 1.25"
OTLOG-UVIRCUT-125
36.33 44.59 -8.26 VAT excl.
Filter Optolong UV-IR Cut to block ultraviolet and infrared rays in cameras that lack this type of filter.
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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).
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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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Filter Optolong L-Pro...
Filters for astronomical telescopes
Optolong
Filter Optolong L-Pro broadband anti-light pollution filter EOS-C
OTLOG-LPRO-EOSCF
190.04 217.00 -26.96 VAT excl.
The L-Pro filter, which prevents the passage of artificial stray light, has five pass bands, located in those regions of the visible spectrum in which astronomical objects emit, and has received a highly positive response from amateur astronomers and astrophotographers.
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Filter Optolong L-Pro...
Filters for astronomical telescopes
Optolong
Filter Optolong L-Pro broadband anti-light pollution filter EOS-FF
OTLOG-LPRO-EOSPFCF
206.57 235.00 -28.43 VAT excl.
The L-Pro filter, which prevents the passage of artificial stray light, has five pass bands, located in those regions of the visible spectrum in which astronomical objects emit, and has received a highly positive response from amateur astronomers and astrophotographers.
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Filter Optolong L-Pro...
Filters for astronomical telescopes
Optolong
Filter Optolong L-Pro broadband anti-light pollution filter NK-FF
OTLOG-LPRO-NKPFCF
206.57 235.00 -28.43 VAT excl.
The L-Pro filter, which prevents the passage of artificial stray light, has five pass bands, located in those regions of the visible spectrum in which astronomical objects emit, and has received a highly positive response from amateur astronomers and astrophotographers.
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Filter Optolong L-Pro...
Filters for astronomical telescopes
Optolong
Filter Optolong L-Pro broadband anti-light pollution filter Sony-FF
OTL91288
206.57 235.00 -28.43 VAT excl.
The L-Pro filter, which prevents the passage of artificial stray light, has five pass bands, located in those regions of the visible spectrum in which astronomical objects emit, and has received a highly positive response from amateur astronomers and astrophotographers.
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