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Imaging Filters

Not every imaging filter is narrowband or LRGB. Ultraviolet and infrared cut filters, luminance filters, methane band filters for planetary work and dedicated infrared pass filters each solve a specific problem, and several of them are more useful than their obscurity suggests. David Astro carries imaging filters in Canada, in Canadian inventory and shipped domestically.

These filters address particular situations rather than general imaging. Tell us what problem you are seeing and we will say whether one of them fixes it.

Filters

SVBONY CLS Light Pollution Filter
CA$31.00 - CA$74.00
CA$31.00 - CA$74.00
CA$31.00 - CA$74.00
CA$31.00

SVBONY CLS Light Pollution Broadband Filter

Options available

Broadband Light Pollution Suppression Effectively Blocks Sodium and Mercury Vapor Streetlights High Transmission on Key Nebula Emission Lines Opti...

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CA$31.00 - CA$74.00
CA$31.00 - CA$74.00
CA$31.00 - CA$74.00
CA$31.00
SVBONY SV164 Dark Filter for CCD/CMOS Cameras
CA$16.00 - CA$19.00
CA$16.00 - CA$19.00
CA$16.00 - CA$19.00
CA$16.00

SVBONY SV164 Dark Filter for CCD and CMOS Cameras

Options available
10 variants in stock

2-inch Filter Size Standard M48x0.75 Threads Enables Automated Dark Frame Capture 1mm Filter Thickness Durable Anodized Aluminum Cell Descripti...

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CA$16.00 - CA$19.00
CA$16.00 - CA$19.00
CA$16.00 - CA$19.00
CA$16.00
SVBONY SV183 685nm IR Pass Filter
CA$26.00 - CA$40.00
CA$26.00 - CA$40.00
CA$26.00 - CA$40.00
CA$26.00

SVBONY SV183 685nm IR Pass Filter

Options available

685nm Infrared (IR) Pass Filter Standard 1.25" Threaded Barrel Transmits >95% of light from 673nm to 1100nm Blocks Visible Light with OD2 Block...

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CA$26.00 - CA$40.00
CA$26.00 - CA$40.00
CA$26.00 - CA$40.00
CA$26.00
SVBONY SV220 3nm Ha/OIII Dual-Band Filter
CA$168.00 - CA$350.00
CA$168.00 - CA$350.00
CA$168.00 - CA$350.00
CA$168.00

SVBONY SV220 3nm H-Alpha & OIII Dual Narrowband Filter

Options available
2 variants in stock

3nm Dual-Bandpass: Isolates H-Alpha (656.3 nm) and OIII (500.7 nm) emission lines with extreme prejudice against light pollution. ≥85% Peak Tran...

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CA$168.00 - CA$350.00
CA$168.00 - CA$350.00
CA$168.00 - CA$350.00
CA$168.00
CA$104.00 - CA$170.00
CA$104.00 - CA$170.00
CA$104.00 - CA$170.00
CA$104.00

SVBONY SV220 7nm Ha/OIII Dual-Band Filter

Options available
6 variants in stock

CA$104.00 - CA$170.00
CA$104.00 - CA$170.00
CA$104.00 - CA$170.00
CA$104.00
SVBONY SV227 H-Alpha 5nm Narrowband Filter - 2"
SVBONY SV227 H-Alpha 5nm Narrowband Filter - 2"
CA$131.00 - CA$131.00
CA$131.00
CA$131.00 - CA$131.00
CA$131.00

SVBONY SV227 H-Alpha 5nm Narrowband Filter - 2"

SV-W9187DB

Isolates the 656.3nm H-Alpha wavelength Aggressive 5nm Full Width at Half Maximum (FWHM) bandpass Peak transmittance of ≥90% for high signal throu...

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CA$131.00 - CA$131.00
CA$131.00
CA$131.00 - CA$131.00
CA$131.00
SVBONY SV227 OIII 5nm Narrowband Filter - 2"
SVBONY SV227 OIII 5nm Narrowband Filter - 2"
CA$131.00 - CA$131.00
CA$131.00
CA$131.00 - CA$131.00
CA$131.00

SVBONY SV227 OIII 5nm Narrowband Filter - 2"

SV-W9187DC

Isolates the Oxygen III emission line at 500.7nm Extremely narrow 5nm Full Width at Half Maximum (FWHM) bandpass Achieves ≥90% peak light transmit...

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CA$131.00 - CA$131.00
CA$131.00
CA$131.00 - CA$131.00
CA$131.00
SVBONY SV227 SHO 5nm H-Alpha OIII SII Narrowband Filter Set - 1.25"
SVBONY SV227 SHO 5nm H-Alpha OIII SII Narrowband Filter Set - 1.25"
CA$235.00 - CA$235.00
CA$235.00
CA$235.00 - CA$235.00
CA$235.00

SVBONY SV227 SHO 5nm H-Alpha OIII SII Narrowband Filter Set - 1.25"

SV-W9187A

Complete 1.25-inch SHO (SII, H-Alpha, OIII) filter set Tight 5nm bandpass for high-contrast imaging Peak transmission rate of ≥90% at key waveleng...

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CA$235.00 - CA$235.00
CA$235.00
CA$235.00 - CA$235.00
CA$235.00
SVBONY SV227 SII 5nm Narrowband Filter - 2"
SVBONY SV227 SII 5nm Narrowband Filter - 2"
CA$131.00 - CA$131.00
CA$131.00
CA$131.00 - CA$131.00
CA$131.00

SVBONY SV227 SII 5nm Narrowband Filter - 2"

SV-W9187DA

Captures Sulfur-II (SII) emission at a 672nm center wavelength Extremely narrow 5nm bandpass for maximum contrast Peak light transmission of ≥90% ...

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CA$131.00 - CA$131.00
CA$131.00
CA$131.00 - CA$131.00
CA$131.00
SVBONY SV231 Fringe Killer Color Correction Filter
CA$43.00 - CA$56.00
CA$43.00 - CA$56.00
CA$43.00 - CA$56.00
CA$43.00

SVBONY SV231 Fringe Killer Color Correction Filter

Options available

Reduces violet fringing (chromatic aberration) in achromatic refractors Standard 1.25" filter threads for universal compatibility Blocks IR wavele...

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CA$43.00 - CA$56.00
CA$43.00 - CA$56.00
CA$43.00 - CA$56.00
CA$43.00
CA$126.00 - CA$168.00
CA$126.00 - CA$168.00
CA$126.00 - CA$168.00
CA$126.00

SVBONY SV240 Near-Infrared Multi-Narrowband Light Pollution Filter

Options available

Designed for urban astrophotography with one-shot color cameras Passes H-Alpha, OIII, H-Beta, and Near-Infrared (NIR) wavelengths Peak transmittan...

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CA$126.00 - CA$168.00
CA$126.00 - CA$168.00
CA$126.00 - CA$168.00
CA$126.00
SVBONY SV260 5-Bandpass Light Pollution Filter - 2"
SVBONY SV260 5-Bandpass Light Pollution Filter - 2"
CA$175.00 - CA$175.00
CA$175.00
CA$175.00 - CA$175.00
CA$175.00

SVBONY SV260 5-Bandpass Light Pollution Filter - 2"

SV-W9194A
2 in stock

5-Bandpass broadband light pollution filter 2-inch size with M48x0.75 thread Over 90% peak transmittance for high signal OD4 blocking of key light...

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CA$175.00 - CA$175.00
CA$175.00
CA$175.00 - CA$175.00
CA$175.00
SVBONY UHC Light Pollution Filter
CA$34.00 - CA$70.00
CA$34.00 - CA$70.00
CA$34.00 - CA$70.00
CA$34.00

SVBONY UHC Ultra High Contrast Light Pollution Filter

Options available

Reduces light pollution from artificial lighting Enhances contrast for emission nebulae Available in 1.25", 2", and Canon EOS-C formats Durable al...

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CA$34.00 - CA$70.00
CA$34.00 - CA$70.00
CA$34.00 - CA$70.00
CA$34.00
SVBONY UV IR-Cut Telescope Filter
CA$22.00 - CA$25.00
CA$22.00 - CA$25.00
CA$22.00 - CA$25.00
CA$22.00

SVBONY UV IR-Cut Filter

Options available
7 variants in stock

Blocks unwanted Ultraviolet (UV) and Infrared (IR) wavelengths Standard 2-inch filter threads for wide compatibility Improves image contrast and c...

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CA$22.00 - CA$25.00
CA$22.00 - CA$25.00
CA$22.00 - CA$25.00
CA$22.00
Vaonis CLS Filter for Vespera
Vaonis CLS Filter for Vespera
CA$321.00 - CA$321.00
CA$321.00
CA$321.00 - CA$321.00
CA$321.00

Vaonis CLS Filter for Vespera

VAO-AC023

City Light Suppression (CLS) Filter Blocks Sodium (Na) and Mercury (Hg) Wavelengths Enhances Contrast for Deep-Sky Objects Automatic Electronic De...

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CA$321.00 - CA$321.00
CA$321.00
CA$321.00 - CA$321.00
CA$321.00
Vaonis Dual Band Filter for Vespera
Vaonis Dual Band Filter for Vespera
CA$559.00 - CA$559.00
CA$559.00
CA$559.00 - CA$559.00
CA$559.00

Vaonis Dual Band Filter for Vespera

VAO-AC022

Dual-band filter isolates Hydrogen-alpha (656.3nm) and Oxygen-III (500.7nm) wavelengths Narrow 12nm bandpass dramatically increases contrast on em...

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CA$559.00 - CA$559.00
CA$559.00
CA$559.00 - CA$559.00
CA$559.00
CA$660.00 - CA$660.00
CA$660.00
CA$660.00 - CA$660.00
CA$660.00

William Optics STC Astro Duo-Narrowband Filter

WO-YF-STC-ADN

Dual-Bandpass for H-Alpha and Oxygen-III Suppresses Urban Light Pollution Ion Beam-Assisted Deposition (IBAD) Coatings High Durability and Easy-to...

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CA$660.00 - CA$660.00
CA$660.00
CA$660.00 - CA$660.00
CA$660.00
CA$328.00 - CA$328.00
CA$328.00
CA$328.00 - CA$328.00
CA$328.00

William Optics STC Ultra Layer Astro Multispectra Filter - 48mm

WO-YF-STC-M48

48mm (M48) Filter Size Multi-Bandpass Light Pollution Suppression Passes H-α, H-β, and OIII Emission Lines Schott B270 Optical Glass Substrate STC...

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CA$328.00 - CA$328.00
CA$328.00
CA$328.00 - CA$328.00
CA$328.00
CA$26.00 - CA$69.00
CA$26.00 - CA$69.00
CA$26.00 - CA$69.00
CA$26.00

ZWO AR Protective Window

Options available
5 variants in stock

Protects camera sensor from dust and humidity 21mm diameter for specific ZWO camera models High-transmission Anti-Reflection (AR) coatings 1/4λ su...

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CA$26.00 - CA$69.00
CA$26.00 - CA$69.00
CA$26.00 - CA$69.00
CA$26.00
CA$139.00 - CA$239.00
CA$139.00 - CA$239.00
CA$139.00 - CA$239.00
CA$139.00

ZWO Duo-Band Filter

Options available
7 variants in stock

Passes H-Alpha (15nm) and OIII (35nm) Wavelengths Designed for One-Shot Color (OSC) Cameras 1.25" Threaded Cell Over 80% Ha & 90% OIII Transmi...

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CA$139.00 - CA$239.00
CA$139.00 - CA$239.00
CA$139.00 - CA$239.00
CA$139.00
CA$40.00 - CA$40.00
CA$40.00
CA$40.00 - CA$40.00
CA$40.00

ZWO IR 850nm Pass Filter – 1.25"

ZWO-850IR1-25
2 in stock

Passes Infrared Light > 850nm Dramatically Steadies Planetary Views in Poor Seeing Enables Daylight Planetary and Lunar Imaging Standard 1.25" ...

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CA$40.00 - CA$40.00
CA$40.00
CA$40.00 - CA$40.00
CA$40.00
CA$26.00 - CA$26.00
CA$26.00
CA$26.00 - CA$26.00
CA$26.00

ZWO IR-Cut Protective Window

Options available

21 mm diameter protective window for select ZWO cameras Integrated UV/IR-Cut filter maintains natural color balance 1/4 λ surface flatness preserv...

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CA$26.00 - CA$26.00
CA$26.00
CA$26.00 - CA$26.00
CA$26.00
CA$207.00 - CA$419.00
CA$207.00 - CA$419.00
CA$207.00 - CA$419.00
CA$207.00

ZWO LRGB Optimized Filters

Options available
3 variants in stock

1.25" (31.75mm) Threaded Filter Set Greater than 92% Transmission at Passband Balanced 1:1:1 RGB Exposure Weighting 1/4 Wavefront Polished Optical...

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CA$207.00 - CA$419.00
CA$207.00 - CA$419.00
CA$207.00 - CA$419.00
CA$207.00
CA$517.00 - CA$979.00
CA$517.00 - CA$979.00
CA$517.00 - CA$979.00
CA$517.00

ZWO Narrowband Filter Set - 7nm H-alpha, OIII & SII

Options available
1 variants in stock

Includes 1.25" H-alpha, OIII, and SII filters 7nm bandpass for high-contrast imaging Ideal for creating "Hubble Palette" images Fine-optically pol...

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CA$517.00 - CA$979.00
CA$517.00 - CA$979.00
CA$517.00 - CA$979.00
CA$517.00

Specialist Imaging Filters

Each of these targets a specific defect or a specific wavelength range that general-purpose filters do not address.

  • UV and IR cut filters: Essential with refractors, which do not focus infrared at the same point as visible light. Without one, stars are bloated and soft in a way that looks like poor optics.
  • Luminance filters: A broad visible-range filter with UV and IR blocking, used as the detail-carrying channel in LRGB imaging.
  • Infrared pass filters: Pass only infrared, which cuts through atmospheric turbulence better than visible light and can sharpen planetary detail in poor seeing.
  • Methane band filters: Very narrow filters at 889 nm revealing atmospheric structure on Jupiter, Saturn and the ice giants that is invisible in visible light.
  • Continuum filters: Narrow green-band filters used for lunar and planetary imaging, reducing the effect of atmospheric dispersion.
  • Anti-halation and reflection considerations: Coating quality matters here too, since a filter close to the sensor can produce reflection artifacts around bright objects.

Why Choose David Astro for Imaging Filters

These are problem-specific purchases, and the first question is whether you have the problem.

  • Diagnosis before recommendation: Send us a sample image and we will tell you whether bloated stars are an infrared problem, a spacing problem or a focus problem.
  • Refractor advice: If you image with a doublet and have no UV/IR cut filter, that is very often the cause of soft bright stars, and it is the cheapest fix in imaging.
  • Seeing-based advice: We will explain when an infrared pass filter genuinely helps planetary work and when it simply costs you resolution.
  • Authorized dealer: Genuine filters with verified coatings and manufacturer warranty, in Canadian stock.
  • Ships from Canada: No duties or brokerage fees for Canadian buyers.

Imaging Filters in Canada — Frequently Asked Questions

Do I need a UV/IR cut filter?
With any refractor, yes. ED doublets and even triplets do not bring infrared to the same focus as visible light, and an unfiltered sensor records that as bloated, soft stars.
Does an infrared filter help with bad seeing?
For planetary imaging, often yes. Longer wavelengths are less affected by atmospheric turbulence, so an IR pass filter can produce sharper results on a poor night, at the cost of some resolution.
What is a methane band filter for?
It isolates a methane absorption band at 889 nm, revealing cloud structure on the gas giants that is invisible in visible light. It is a specialist filter needing substantial aperture and long exposures.
Why are my bright stars bloated?
Most commonly unblocked infrared in a refractor, sometimes filter reflections, sometimes back-focus error. Send us a crop and we will tell you which.

Diagnosing an imaging problem?

Send us a sample crop and we will tell you what will actually fix it. Held in Canada, shipped fast.