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-Para...
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Optolong
Filter Optolong L-Para (L-Parallels) 2"
OTL-L-Para-200
165.25 206.57 -41.32 VAT excl.
L-Para is a new 10nm narrow band dual light pollution filter. The FWHM of L-Para is 10nm for OIII (500.7nm) and H-alpha (656.3 nm) respectively. The transmittance of the nebulae emission lines in are both greater than 85% in system with focal ratios of F2 and higher. It effectively filters the emission lines of mercury, sodium and LED lamps. At the same...
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OPTOLONG L2-DUAL...
Narrow band filters for CCD cameras
Optolong
OPTOLONG L2-DUAL (L-eXtreme+L-Synergy) filter combo set in 2"
OTLL2-DUAL200
371.86 483.43 -111.57 VAT excl.
Set of filters Optolong L2 Dual-Combo (L-eXtreme + L-Synergy) in 2" format. Ideal for astrophotography with color cameras, it allows to capture images in Hubble palette (SHO) without the need of a monochrome camera. High transmission, halo suppression and compatibility with fast telescopes as low as f/3.3.
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Pack Filters Optolong...
Narrow band filters for CCD cameras
Optolong
Pack Filters Optolong L-Quad Enhance + L-Para 2" - Astrophotography in city and...
OTLL1DUALCOMBO
268.55 VAT excl.
Get the ideal combo of Optolong filters for astrophotography: the L-Quad Enhance and the exclusive L-Para-L, both in 2" format. Enhance contrast and eliminate light pollution with this must-have pack.
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OPTOLONG L-SYNERGY narrow...
Narrow band filters for CCD cameras
Optolong
OPTOLONG L-SYNERGY narrow band dual filter in 2"
OTLLSYNERGY200
200.78 264.42 -63.64 VAT excl.
Filter Optolong L-Synergy 2" dual narrowband (SII + OIII, 7 nm). Designed for color and DSLR cameras, it allows to obtain images of nebulae in Hubble (SHO) palette even from skies with light pollution. High transmission, high contrast and minimal halos. Optolong L-Synergy is a 7 nm dual narrow-band filter compatible with DSLR cameras, color CMOS sensors...
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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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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 Optolong L-Quad...
Filters for astronomical telescopes
Optolong
Filter Optolong L-Quad Enhance (L-QEF) 2"
OTLOG-L-QEF200
140.45 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 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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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 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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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 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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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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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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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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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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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 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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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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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 Optolong anti-light...
Filters for astronomical telescopes
Optolong
Filter Optolong anti-light pollution filter CLS EOS-C
OTLOG-CLS-EOSCF
77.64 83.00 -5.36 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 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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Set of filters Optolong SHO...
Filters for astronomical telescopes
Optolong
Set of filters Optolong SHO narrow band in 2"
OTLOG-SHO7-200
454.50 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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