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 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 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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OIII-CCD 6.5 nm 1.25" deep...
Filters for astronomical telescopes
Optolong
OIII-CCD 6.5 nm 1.25" deep space astrophotographic filter Optolong
OTLOG-OIIICCD65-125
128.89 137.15 -8.26 VAT excl.
Very narrow-band OIII-CCD filter designed to observe nebulae, focusing on the wavelength corresponding to the OIII emission lines and reducing stray light wavelengths (artificial lights and skyglow), being one of the components of the Hubble color palette.
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Filter Optolong anti-light...
Filters for astronomical telescopes
Optolong
Filter Optolong anti-light pollution UHC 1.25"
OTLOG-UHC125
45.42 53.68 -8.26 VAT excl.
UHC (Ultra High Contrast) broadband filter designed to improve the visibility of deep sky objects, reducing the transmission of polluting wavelengths, produced by artificial lights, and the emission of neutral oxygen in our atmosphere (skyglow), being highly transparent in the main emission lines of nebulae.
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Clear Filter Optolong 1.25"...
Filters for astronomical telescopes
Optolong
Clear Filter Optolong 1.25" Clear Filter
OTLOG-CLEAR-125
20.62 24.75 -4.13 VAT excl.
Clear transparent filter can be used as dust protection, as a parafocal device for other filters or as a UV/IR filter in retro-reflective systems.
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Clip Filter Optolong...
Filters for astronomical telescopes
Optolong
Clip Filter Optolong anti-light pollution filter UHC EOS Full Frame
OTLOG-UHC-EOSPFCF
94.17 110.70 -16.53 VAT excl.
UHC (Ultra High Contrast) broadband filter designed to improve the visibility of deep sky objects, reducing the transmission of polluting wavelengths produced by artificial lights and the emission of neutral oxygen in our atmosphere (skyglow), being highly transparent in the main emission lines of nebulae.
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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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Clip Filter Optolong...
Filters for astronomical telescopes
Optolong
Clip Filter Optolong anti-light pollution filter UHC Nikon Full Frame
OTLOG-UHC-NKPFCF
94.17 110.70 -16.53 VAT excl.
UHC (Ultra High Contrast) broadband filter designed to improve the visibility of deep sky objects, reducing the transmission of polluting wavelengths produced by artificial lights and the emission of neutral oxygen in our atmosphere (skyglow), being highly transparent in the main emission lines of nebulae.
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Filter Optolong UV-IR Cut...
Filters for astronomical telescopes
Optolong
Filter Optolong UV-IR Cut round 31x2,0mm without frame
OTLOG-UVIRCUT-31C
43.76 52.02 -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 UV-IR Cut...
Filters for astronomical telescopes
Optolong
Filter Optolong UV-IR Cut round 36x2,0mm without frame
OTLOG-UVIRCUT-36C
45.42 53.68 -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 H-A7...
Filters for astronomical telescopes
Optolong
Filter Optolong H-A7 (H-Alpha 7nm) round 31x2.0mm without frame
OTLOG-HA7-31C
152.85 161.11 -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-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 anti-light...
Filters for astronomical telescopes
Optolong
Filter Optolong anti-light pollution CLS 2"
OTLOG-CLS200
69.38 74.00 -4.62 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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Astrophotographic filter...
Filters for astronomical telescopes
Optolong
Astrophotographic filter Optolong for deep space OIII-CCD 6.5 nm round 31x2,0mm without...
OTLOG-OIIICCD65-31C
152.03 160.29 -8.26 VAT excl.
Very narrow-band OIII-CCD filter designed to observe nebulae, focusing on the wavelength corresponding to the OIII emission lines and reducing stray light wavelengths (artificial lights and skyglow), being one of the components of the Hubble color palette.
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Astrophotographic filter...
Filters for astronomical telescopes
Optolong
Astrophotographic filter Optolong deep space filter OIII-CCD 6.5 nm round 36x2.0mm...
OG-OIIICCD65-36C
156.99 165.25 -8.26 VAT excl.
Very narrow-band OIII-CCD filter designed to observe nebulae, focusing on the wavelength corresponding to the OIII emission lines and reducing stray light wavelengths (artificial lights and skyglow), being one of the components of the Hubble color palette.
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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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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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OIII-CCD 6.5 nm 2" deep...
Filters for astronomical telescopes
Optolong
OIII-CCD 6.5 nm 2" deep space astrophotographic filter Optolong
OTLOG-OIIICCD65-200
208.23 216.49 -8.26 VAT excl.
Very narrow-band OIII-CCD filter designed to observe nebulae, focusing on the wavelength corresponding to the OIII emission lines and reducing stray light wavelengths (artificial lights and skyglow), being one of the components of the Hubble color palette.
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