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 anti-light pollution broadband 2"
OTLOG-L-PRO200
145.41 174.00 -28.59 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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Dual narrow band astronomy...
Filters for astronomical telescopes
Optolong
Dual narrow band astronomy filter Optolong L-eXtreme 2" L-eXtreme 2"
OTLOG-L-EXTR200
224.75 247.93 -23.18 VAT excl.
Unlike the Optolong L-eNhance filter, which is three-band (transmits Hb, Ha and OIII), the L-eXtreme filter is dual-band allowing the Ha and OIII emission lines to pass through.
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Filtro Optolong L-Para...
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Optolong
Filtro Optolong L-Para (L-Parallels) 2"
OTL-L-Para-200
206.57 VAT excl.
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Filter Optolong L-eNhance...
Filters for astronomical telescopes
Optolong
Filter Optolong L-eNhance nebular for DSLR and color cameras 2"
OTLOG-L-ENH200
167.73 214.01 -46.28 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 set Optolong LRGB 2"
Filters for astronomical telescopes
Optolong
Filter set Optolong LRGB 2"
OTLOG-LRVB-200
289.22 297.48 -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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OPTOLONG L-ULTIMATE Dual...
Narrow band filters for CCD cameras
Optolong
OPTOLONG L-ULTIMATE Dual 3nm 2" filter
OTLL-Ultimate2
289.21 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 UV-IR Cut 2"
Filters for astronomical telescopes
Optolong
Filter Optolong UV-IR Cut 2"
OTLOG-UVIRCUT-200
55.34 63.60 -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 L-Pro...
Filters for astronomical telescopes
Optolong
Filter Optolong L-Pro broadband anti-light pollution 1.25"
OTLOG-L-PRO125
121.45 130.00 -8.55 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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Clear Filter Optolong 2"
Filters for astronomical telescopes
Optolong
Clear Filter Optolong 2"
OTLOG-CLEAR-200
25.58 29.71 -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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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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Skyglow Filter Optolong 2"
Filters for astronomical telescopes
Optolong
Skyglow Filter Optolong 2"
OTLOG-SKYGLOW-200
38.81 47.07 -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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Dual narrow band astronomy...
Filters for astronomical telescopes
Optolong
Dual narrow band astronomy filter Optolong L-eXtreme 1.25" L-eXtreme 1.25
OTLOG-L-EXTR125
180.12 190.08 -9.96 VAT excl.
Unlike the Optolong L-eNhance filter, which is three-band (transmits Hb, Ha and OIII), the L-eXtreme filter is dual-band allowing the Ha and OIII emission lines to pass through.
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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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Set of color filters...
Filters for astronomical telescopes
Optolong
Set of color filters Optolong LRGB 36"
OTLOG-LRVB-36mm
210.71 218.97 -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 L-eNhance...
Filters for astronomical telescopes
Optolong
Filter Optolong L-eNhance nebular filter for DSLR and color cameras 1.25
OTLOG-L-ENH125
152.02 168.55 -16.53 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 L-Quad...
Filters for astronomical telescopes
Optolong
Filter Optolong L-Quad Enhance (L-QEF) 2"
OTLOG-L-QEF200
165.25 197.52 -32.27 VAT excl.
L-QEF suppresses light pollution from mercury and sodium lamps and produces a beautiful broadband image with minimal color cast. This filter is a broadband filter that suppresses wavelengths of light pollution. It is good for star clusters, dark and reflection nebulae, and galaxies in light polluted skies.
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Filter Optolong H-A7...
Filters for astronomical telescopes
Optolong
Filter Optolong H-A7 (H-Alfa 7nm) 2"
OTLOG-HA7-200
211.53 226.00 -14.47 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-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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Fitro Optolong OIII 18nm...
Filters for astronomical telescopes
Optolong
Fitro Optolong OIII 18nm 1,25" OIII 18nm 1,25" Fitro OIII 18nm 1,25"
OTLOG-OIII18-125
64.43 72.69 -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 H-A7...
Filters for astronomical telescopes
Optolong
Filter Optolong H-A7 (H-Alpha 7nm) round 36x2,0mm without frame
OTLOG-HA7-36C
155.33 163.59 -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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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-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 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 UHC 2"
OTLOG-UHC200
69.38 77.64 -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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