[2023 NEW] Optolong L-Quad Enhance Filter (L-QEF) quad bandpass light pollution suppression filter

L-QEF cuts out light pollution from mercury and sodium lamps and produces a nice broadband image with minimal ...

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[2023 NEW] Optolong L-eXtreme F2 fast optics highspeed dual-band narrowband pass filter

Optolong L-eXtreme F2 is a dual-band (500.7 nm and 656.28 nm, FWHM=7 nm) narrowband pass filter that meets the...

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[2023 NEW SIZE] Optolong L-Ultimate dual-3nm 1.25" filter

Optolong L-Ultimate 1.25" has been added. It's about a 3nm dual band designed to drastically reduce the effe...

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[2022 NEW] Optolong L-Ultimate dual-3nm filter

It's about a 3nm dual band designed to drastically reduce the effect of light pollution, the 3nm isolates the ...

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Planetary Filters kit

Optolong Planetary filters kit including UV/IR Cut, R, G, B, and IR685, 5pcs filters in total. These five fil...

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[2021 NEW] Optolong SHO-3nm narrowband filters kit

Optolong SHO-3nm filter kit includes SII3nm, H-Alpha3nm, and OIII3nm narrow band filters, generally working wi...

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[NEW] Optolong Canon EOS R Clip

Canon EOS R L-Pro clip filter Applicable camera body: EOS R/Ra、EOS RP、EOS R5、EOS R6 Applicable Lenses: 1>Ful...

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Optolong UV/IR Cut

Optolong UV/IR Cut filter is designed for ultraviolet and infrared wavelength blocking to improve sharpness of...

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

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

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Optolong narrowband OIII filter is designed for nebula observation allowing 18nm bandwidth of light centered on a wavelength of 500nm through

Optolong narrowband OIII filter is designed for nebula observation allowing 18nm bandwidth of light centered o...

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Narrowband H-beta filter is designed for nebula observation allowing 12nm bandwidth of light centered on a wavelength of 486nm through

Narrowband H-beta filter is designed for nebula observation allowing 12nm bandwidth of light centered on a wav...

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The CLS-CCD broadband filter is designed to improve the visibility of various deepsky objects

The CLS-CCD broadband filter is designed to improve the visibility of various deepsky objects....

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Optolong CLS (City Light Suppression) broadband filter is designed to improve the visibility of various deepsky objects.

The CLS (City Light Suppression) broadband filter is designed to improve the visibility of various deepsky obj...

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ND3.0 neutral density filter to reduce transmission evenly across a portion of a specific spectrum

Neutral density(ND) filters are designed to reduce transmission evenly across a portion of a specific spectrum...

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Clear focusing filter is designed to highly pass the visible spectral region 420-680nm at 98.5% transmission

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

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