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Optolong is located in Kunming, Yunnan Province, and was founded in 1999. After 18 years of development, a product range has been created, consisting mainly of astronomical fluorescence filters: filters and bandpass filters, complimented by ultraviolet and infrared filters, together with other optical filters. The company currently employs almost 60 members of staff and the factory space occupies more than 2,000 ㎡. With high-quality products, an extensive range and reasonable prices, Optolong is a reliable partner for astronomical filters.

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Optolong Filters L-eXtreme 2"
Optolong
Filters L-eXtreme 2"
$ 342.00
ready for shipping in 24 h
Optolong Filters L-eNhance 2"
Optolong
Filters L-eNhance 2"
( 5 / 5 )
$ 249.00
ready for shipping in 24 h
Optolong Filters SII Filter 2"
Optolong
Filters SII Filter 2"
RRP:  $ 249.00
Our price:
$ 238.00
ready for shipping in 24 h
Optolong Filters L-eNhance 1.25
Optolong
Filters L-eNhance 1.25
RRP:  $ 197.00
Our price:
$ 186.00
ready for shipping in 24 h
Optolong Filters SHO Filter Kit 3nm 2"
Optolong
Filters SHO Filter Kit 3nm 2"
$ 1,340.00
ready for shipping in 24 h
Optolong Filters L-eNhance APS-C EOS Clip
Optolong
Filters L-eNhance APS-C EOS Clip
( 3.5 / 5 )
$ 280.00
ready for shipping in 24 h
Optolong Filters L-Ultimate 1,25"
Optolong
Filters L-Ultimate 1,25"
$ 270.00
ready for shipping in 24 h
Optolong Filters L-Ultimate 2"
Optolong
Filters L-Ultimate 2"
$ 415.00
ready for shipping in 3-5 weeks
Optolong Filters L-Pro Filter 77mm
Optolong
Filters L-Pro Filter 77mm
RRP:  $ 374.00
Our price:
$ 299.00
ready for shipping in 24 h
Optolong Filters L-Pro Clip Sony Full Frame V2
Optolong
Filters L-Pro Clip Sony Full Frame V2
$ 249.00
ready for shipping in 24 h
Optolong Filters L-eXtreme 1,25"
Optolong
Filters L-eXtreme 1,25"
$ 259.00
ready for shipping in 24 h
Optolong Filters L-Pro Canon EOS R Clip
Optolong
Filters L-Pro Canon EOS R Clip
RRP:  $ 311.00
Our price:
$ 249.00
ready for shipping in 24 h
Optolong Filters LRGB Filter-Set 2"
Optolong
Filters LRGB Filter-Set 2"
RRP:  $ 384.00
Our price:
$ 332.00
ready for shipping in 24 h
Optolong Filters L-Quad Enhance 2"
Optolong
Filters L-Quad Enhance 2"
RRP:  $ 249.00
Our price:
$ 238.00
ready for shipping in 3-5 weeks
Optolong SII Filters 1.25"
Optolong
SII Filters 1.25"
$ 150.00
ready for shipping in 24 h
Optolong Filters Clear Sky Filter 82mm
Optolong
Filters Clear Sky Filter 82mm
$ 228.00
ready for shipping in 24 h
Optolong Filters SHO Filter Kit 1,25"
Optolong
Filters SHO Filter Kit 1,25"
$ 550.00
ready for shipping in 24 h
Optolong Filters L-Pro Clip Sony Full Frame
Optolong
Filters L-Pro Clip Sony Full Frame
RRP:  $ 290.00
Our price:
$ 252.00
ready for shipping in 24 h
Optolong Filters SHO Filter Kit 2"
Optolong
Filters SHO Filter Kit 2"
$ 750.00
ready for shipping in 24 h
Optolong Filters SII 3nm 2"
Optolong
Filters SII 3nm 2"
$ 940.00
ready for shipping in 24 h
Optolong Filters Planetary Filter Set 1.25"
Optolong
Filters Planetary Filter Set 1.25"
$ 280.00
ready for shipping in 24 h
Optolong Filters UHC Filter, 2"
Optolong
Filters UHC Filter, 2"
$ 155.00
ready for shipping in 24 h
Optolong Filters Clear Focusing 2"
Optolong
Filters Clear Focusing 2"
$ 72.00
ready for shipping in 24 h
Optolong Filters L-eXtreme F2 (2")
Optolong
Filters L-eXtreme F2 (2")
$ 363.00
ready for shipping in 3-5 weeks
Optolong Filters H-alpha 7nm 2"
Optolong
Filters H-alpha 7nm 2"
$ 195.00
ready for shipping in 24 h
Optolong Filters UHC Filter 1,25
Optolong
Filters UHC Filter 1,25
( 5 / 5 )
$ 83.00
ready for shipping in 3-5 weeks
Optolong Filters Clear Sky Filter 77mm
Optolong
Filters Clear Sky Filter 77mm
$ 176.00
ready for shipping in 3-5 weeks
Optolong Filters Planetary Filter Set 2"
Optolong
Filters Planetary Filter Set 2"
$ 415.00
ready for shipping in 3-5 weeks
Optolong Filters OIII 3nm 2"
Optolong
Filters OIII 3nm 2"
RRP:  $ 467.00
Our price:
$ 415.00
ready for shipping in 3-5 weeks
Optolong Filters H-alpha 3nm 2"
Optolong
Filters H-alpha 3nm 2"
RRP:  $ 467.00
Our price:
$ 415.00
ready for shipping in 3-5 weeks
Optolong Filters LRGB Filter-Set 1,25
Optolong
Filters LRGB Filter-Set 1,25
RRP:  $ 255.00
Our price:
$ 218.00
ready for shipping in 3-5 weeks
Optolong Filters LRGB filter set 31mm (unmounted)
Optolong
Filters LRGB filter set 31mm (unmounted)
$ 236.00
ready for shipping in 3-5 weeks
Optolong Filters H-alpha 7nm 1.25"
Optolong
Filters H-alpha 7nm 1.25"
RRP:  $ 182.00
Our price:
$ 155.00
ready for shipping in 3-7 days
Optolong Filters Clear Focusing 1,25"
Optolong
Filters Clear Focusing 1,25"
$ 51.00
ready for shipping in 3-5 weeks
Optolong Filters L-Para 2"
Optolong
Filters L-Para 2"
$ 311.00
ready for shipping in 3-5 weeks