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FREE SHIPPING FOR ORDERS OVER $500* Some exceptions may apply. / This is Astronomy Plus OFFICIAL website.
FREE SHIPPING FOR ORDERS OVER $500* Some exceptions may apply. / This is Astronomy Plus OFFICIAL website

Optolong

Optolong has become an integrated enterprise not only specialized in R&D, but also good at manufacturing astronomy filters and fluorescence filters and pushing them into the market.

Filters

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Original price $59.00 - Original price $88.00
Original price
$59.00 - $88.00
$59.00 - $88.00
Current price $59.00

Optolong UV/IR CUT

Optolong UV/IR CUT Optolong UV/IR Cut filter is designed for ultraviolet and infrared wavelength blocking to improve sharpness of the image as most...

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Original price $59.00 - Original price $88.00
Original price
$59.00 - $88.00
$59.00 - $88.00
Current price $59.00
Original price $190.00 - Original price $393.00
Original price
$190.00 - $393.00
$190.00 - $393.00
Current price $190.00

Optolong L-Pro Filter

Optolong L-Pro Filter The Optolong L-Pro Filter is designed to improve the visibility of various deepsky objects. By selectively reducing the trans...

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Original price $190.00 - Original price $393.00
Original price
$190.00 - $393.00
$190.00 - $393.00
Current price $190.00
Original price $319.00 - Original price $410.00
Original price
$319.00 - $410.00
$319.00 - $410.00
Current price $319.00

Optolong L-Extreme Dual-Band Filter

Optolong L-Extreme Dual-Band Astronomy NarrowBand Filter The advantage of the L-eXtreme filter is that there is no transmission between the H-beta ...

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Original price $319.00 - Original price $410.00
Original price
$319.00 - $410.00
$319.00 - $410.00
Current price $319.00
Original price $240.00 - Original price $350.00
Original price
$240.00 - $350.00
$240.00 - $350.00
Current price $240.00

Optolong L-eNhance Duo Band Filter

Optolong L-eNhance Duo Band Filter The relentless spread or urbanization and its associated light pollution have become a growing problem for all a...

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Original price $240.00 - Original price $350.00
Original price
$240.00 - $350.00
$240.00 - $350.00
Current price $240.00
Original price $390.00 - Original price $525.00
Original price
$390.00 - $525.00
$390.00 - $525.00
Current price $390.00

Optolong L-Ultimate Dual-Band 3nm Filter

Optolong L-Ultimate Filter It’s about a 3nm dual band designed to drastically reduce the effect of light pollution, the 3nm isolates the nebulae’s ...

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Original price $390.00 - Original price $525.00
Original price
$390.00 - $525.00
$390.00 - $525.00
Current price $390.00
Original price $269.00 - Original price $269.00
Original price
$269.00
$269.00 - $269.00
Current price $269.00

Optolong L-Quad Enhance Filter 2" Light Pollution Suppression Filter (L-QEF)

Optolong L-Quad Enhance Filter L-Quad Enhance Filter (L-QEF) is a quad bandpass light pollution suppression filter for colour cameras. It effective...

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Original price $269.00 - Original price $269.00
Original price
$269.00
$269.00 - $269.00
Current price $269.00
Original price $32.00 - Original price $41.00
Original price
$32.00 - $41.00
$32.00 - $41.00
Current price $32.00

Optolong Clear Focusing Filter

Optolong Clear Focusing Filter Optolong Clear focusing filter is designed to highly pass the visible spectral region 420-680nm at 98.5% transmissio...

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Original price $32.00 - Original price $41.00
Original price
$32.00 - $41.00
$32.00 - $41.00
Current price $32.00
Original price $70.00 - Original price $250.00
Original price
$70.00 - $250.00
$70.00 - $250.00
Current price $70.00

Optolong UHC Light Pollution Filter

Optolong UHC Light Pollution Filter The UHC (Ultra High Contrast) broadband filter is designed to improve the visibility of various deepsky objects...

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Original price $70.00 - Original price $250.00
Original price
$70.00 - $250.00
$70.00 - $250.00
Current price $70.00
Original price $416.00 - Original price $416.00
Original price
$416.00
$416.00 - $416.00
Current price $416.00

Optolong L-eXtreme F2 Fast Optics Dual Narrowband 2" (L-EXTREME-F2)

Optolong L-eXtreme F2 Fast Optics Dual Narrowband 2" Optolong L-eXtreme F2 is a dual-band (500.7 nm and 656.28 nm, FWHM=7 nm) narrowband pass filt...

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Original price $416.00 - Original price $416.00
Original price
$416.00
$416.00 - $416.00
Current price $416.00
Original price $42.56 - Original price $63.84
Original price
$42.56 - $63.84
$42.56 - $63.84
Current price $42.56

Optolong Moon & Skyglow Filter

Optolong Moon & Skyglow Filter Optolong Moon & Skyglow filter is designed to darken the background sky by blocking light transmission from ...

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Original price $42.56 - Original price $63.84
Original price
$42.56 - $63.84
$42.56 - $63.84
Current price $42.56
Original price $215.00 - Original price $309.00
Original price
$215.00 - $309.00
$215.00 - $309.00
Current price $215.00

Optolong SII 6.5nm Imaging Narrowband Filter

Optolong SII 6.5nm Imaging Narrowband Filter Optolongimproved narrowband SII6.5nm filter (Sulful II for CCD) is designed for nebula observation all...

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Original price $215.00 - Original price $309.00
Original price
$215.00 - $309.00
$215.00 - $309.00
Current price $215.00
Original price $1,279.00 - Original price $1,555.00
Original price
$1,279.00 - $1,555.00
$1,279.00 - $1,555.00
Current price $1,279.00

Optolong SHO 3nm Narrowband Filters Kit

Optolong SHO 3nm Narrowband Filters Kit Optolong SHO-3nm Narrowband Filters Introduction Optolong SHO-3nm filter kit includes SII 3nm, H-Alpha 3nm,...

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Original price $1,279.00 - Original price $1,555.00
Original price
$1,279.00 - $1,555.00
$1,279.00 - $1,555.00
Current price $1,279.00
Original price $105.07 - Original price $158.27
Original price
$105.07 - $158.27
$105.07 - $158.27
Current price $105.07

Optolong Night Sky H-Alpha filter (IR-Pass 650nm)

Optolong Night Sky H-Alpha filter Night Sky H-Alpha filter (IR Pass 650nm) with 50% transition from blocking to passing at about 640nm and 95% or a...

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Original price $105.07 - Original price $158.27
Original price
$105.07 - $158.27
$105.07 - $158.27
Current price $105.07
Original price $65.17 - Original price $105.07
Original price
$65.17 - $105.07
$65.17 - $105.07
Current price $65.17

Optolong ND3.0 Neutral Density Filter

Optolong ND3.0 Neutral Density Filter Neutral Density (ND) filters are designed to reduce transmission evenly across a portion of a specific spectr...

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Original price $65.17 - Original price $105.07
Original price
$65.17 - $105.07
$65.17 - $105.07
Current price $65.17
Original price $115.00 - Original price $177.00
Original price
$115.00 - $177.00
$115.00 - $177.00
Current price $115.00

Optolong Narrowband H-Beta filter

Optolong Narrowband H-Beta filter Opotlong narrowband H-beta filter is designed for nebula observation allowing 12nm bandwidth of light centered on...

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Original price $115.00 - Original price $177.00
Original price
$115.00 - $177.00
$115.00 - $177.00
Current price $115.00
Original price $309.00 - Original price $485.00
Original price
$309.00 - $485.00
$309.00 - $485.00
Current price $309.00

Optolong LRGB Filter Set

Optolong LRGB Filter Set The Optolong LRGB Filter Set is designed for maximum contrast and with extremely high gradients for clear differentiation ...

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Original price $309.00 - Original price $485.00
Original price
$309.00 - $485.00
$309.00 - $485.00
Current price $309.00
Original price $100.00 - Original price $155.00
Original price
$100.00 - $155.00
$100.00 - $155.00
Current price $100.00

Optolong IR Pass685 Planetary Filter

Optolong IR Pass685 Planetary Filter Optolong IR Pass 685nm filter is designed to block wavelengths below 670nm and can be used in IR-LRGB imaging ...

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Original price $100.00 - Original price $155.00
Original price
$100.00 - $155.00
$100.00 - $155.00
Current price $100.00
Original price $215.00 - Original price $309.00
Original price
$215.00 - $309.00
$215.00 - $309.00
Current price $215.00

Optolong Improved OIII 6.5nm Narrowband Filter

Optolong Improved OIII 6.5nm Narrowband Filter Optolong improved extra Narrowband OIII-CCD 6.5nm filter is designed for nebula observation allowing...

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Original price $215.00 - Original price $309.00
Original price
$215.00 - $309.00
$215.00 - $309.00
Current price $215.00
Original price $600.00 - Original price $940.00
Original price
$600.00 - $940.00
$600.00 - $940.00
Current price $600.00

Optolong Improved NB Filters SHO 6.5nm Narrowband Filter Kit

Optolong NB Filters SHO 6.5nm Narrowband Filter Kit Optolong SHO6.5nm filter kit includes SII6.5nm, H-Alpha7nm, and OIII6.5nm narrow-band filters, ...

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Original price $600.00 - Original price $940.00
Original price
$600.00 - $940.00
$600.00 - $940.00
Current price $600.00
Original price $215.00 - Original price $309.00
Original price
$215.00 - $309.00
$215.00 - $309.00
Current price $215.00

Optolong H-Alpha 7nm Narrowband Filter

Optolong H-Alpha 7nm Narrowband Filter Optolong improved version of H-Alpha 7nm filter is the popular narrowband filter allowing 7nm bandwidth of l...

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Original price $215.00 - Original price $309.00
Original price
$215.00 - $309.00
$215.00 - $309.00
Current price $215.00
Original price $122.00 - Original price $205.00
Original price
$122.00 - $205.00
$122.00 - $205.00
Current price $122.00

Optolong CLS-CCD(City Light Suppression) Broadband Filter

Optolong CLS CCD (City Light Suppression) Broadband Filter The CLS (City Light Suppression) broadband filter is designed to improve the visibility ...

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Original price $122.00 - Original price $205.00
Original price
$122.00 - $205.00
$122.00 - $205.00
Current price $122.00
Original price $70.00 - Original price $110.00
Original price
$70.00 - $110.00
$70.00 - $110.00
Current price $70.00

Optolong CLS(City Light Suppression) Broadband Filter

Optolong CLS (City Light Suppression) Broadband Filter 1.  Optolong CLS Introduction The CLS (City Light Suppression) broadband filter is designed ...

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Original price $70.00 - Original price $110.00
Original price
$70.00 - $110.00
$70.00 - $110.00
Current price $70.00
Original price $220.00 - Original price $273.00
Original price
$220.00 - $273.00
$220.00 - $273.00
Current price $220.00

Optolong Clear Sky Filter Screw on Lens

Optolong Clear Sky Filter Screw on Lens 1. Optolong Clear Sky Filter Introduction A screw on filter with the easiest installation way like UV fi...

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Original price $220.00 - Original price $273.00
Original price
$220.00 - $273.00
$220.00 - $273.00
Current price $220.00
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