Optolong

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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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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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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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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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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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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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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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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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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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Filters for astronomical telescopes

Optolong

Filter Optolong L-Pro broadband anti-light pollution 1.25"

OTLOG-L-PRO125

115.66 VAT excl.

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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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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.

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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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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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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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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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Filters for astronomical telescopes

Optolong

Filter Optolong anti-light pollution UHC 2"

OTLOG-UHC200

69.38 77.64 -8.26 VAT excl.

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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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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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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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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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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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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.

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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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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 optical glass coating technology allows them to design and produce filters with a truly sophisticated combination of 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 light, has five pass bands, located in those regions of the visible spectrum where astronomical objects emit, and has received a highly positive response from amateur astronomers and astrophotographers. Optolong also manufactures other filters such as UHC, H-Beta, O-III, H-Alpha, SII, LRGB, Night Sky H-Alpha.

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