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Filtres d'astrophotographie

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.

Filtres

SVBONY CLS Light Pollution Filter
$22.07 - $52.55
$22.07 - $52.55
$22.07 - $52.55
$22.07

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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$22.07 - $52.55
$22.07 - $52.55
$22.07 - $52.55
$22.07
SVBONY SV164 Dark Filter for CCD/CMOS Cameras
$11.19 - $13.43
$11.19 - $13.43
$11.19 - $13.43
$11.19

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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$11.19 - $13.43
$11.19 - $13.43
$11.19 - $13.43
$11.19
SVBONY SV183 685nm IR Pass Filter
$18.35 - $28.79
$18.35 - $28.79
$18.35 - $28.79
$18.35

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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$18.35 - $28.79
$18.35 - $28.79
$18.35 - $28.79
$18.35
SVBONY SV220 3nm Ha/OIII Dual-Band Filter
$119.99 - $249.99
$119.99 - $249.99
$119.99 - $249.99
$119.99

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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$119.99 - $249.99
$119.99 - $249.99
$119.99 - $249.99
$119.99
$73.56 - $120.24
$73.56 - $120.24
$73.56 - $120.24
$73.56

SVBONY SV220 7nm Ha/OIII Dual-Band Filter

Options available
6 variants in stock

$73.56 - $120.24
$73.56 - $120.24
$73.56 - $120.24
$73.56
SVBONY SV227 H-Alpha 5nm Narrowband Filter - 2"
SVBONY SV227 H-Alpha 5nm Narrowband Filter - 2"
$93.33 - $93.33
$93.33
$93.33 - $93.33
$93.33

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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$93.33 - $93.33
$93.33
$93.33 - $93.33
$93.33
SVBONY SV227 OIII 5nm Narrowband Filter - 2"
SVBONY SV227 OIII 5nm Narrowband Filter - 2"
$93.33 - $93.33
$93.33
$93.33 - $93.33
$93.33

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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$93.33 - $93.33
$93.33
$93.33 - $93.33
$93.33
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"
$167.99 - $167.99
$167.99
$167.99 - $167.99
$167.99

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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$167.99 - $167.99
$167.99
$167.99 - $167.99
$167.99
SVBONY SV227 SII 5nm Narrowband Filter - 2"
SVBONY SV227 SII 5nm Narrowband Filter - 2"
$93.33 - $93.33
$93.33
$93.33 - $93.33
$93.33

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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$93.33 - $93.33
$93.33
$93.33 - $93.33
$93.33
SVBONY SV231 Fringe Killer Color Correction Filter
$30.95 - $40.31
$30.95 - $40.31
$30.95 - $40.31
$30.95

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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$30.95 - $40.31
$30.95 - $40.31
$30.95 - $40.31
$30.95
$89.99 - $119.99
$89.99 - $119.99
$89.99 - $119.99
$89.99

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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$89.99 - $119.99
$89.99 - $119.99
$89.99 - $119.99
$89.99
SVBONY SV260 5-Bandpass Light Pollution Filter - 2"
SVBONY SV260 5-Bandpass Light Pollution Filter - 2"
$124.99 - $124.99
$124.99
$124.99 - $124.99
$124.99

SVBONY SV260 5-Bandpass Light Pollution Filter - 2"

SV-W9194A
2 en 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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$124.99 - $124.99
$124.99
$124.99 - $124.99
$124.99
SVBONY UHC Light Pollution Filter
$24.00 - $50.31
$24.00 - $50.31
$24.00 - $50.31
$24.00

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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$24.00 - $50.31
$24.00 - $50.31
$24.00 - $50.31
$24.00
SVBONY UV IR-Cut Telescope Filter
$15.99 - $17.99
$15.99 - $17.99
$15.99 - $17.99
$15.99

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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$15.99 - $17.99
$15.99 - $17.99
$15.99 - $17.99
$15.99
Vaonis CLS Filter for Vespera
Vaonis CLS Filter for Vespera
$229.00 - $229.00
$229.00
$229.00 - $229.00
$229.00

Vaonis Filtre CLS pour Vespera

VAO-AC023

Filtre antipollution lumineuse CLS (City Light Suppression) Bloque les longueurs d'onde du sodium (Na) et du mercure (Hg) Améliore le contraste de...

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$229.00 - $229.00
$229.00
$229.00 - $229.00
$229.00
Vaonis Dual Band Filter for Vespera
Vaonis Dual Band Filter for Vespera
$399.00 - $399.00
$399.00
$399.00 - $399.00
$399.00

Vaonis Filtre Dual Band pour Vespera

VAO-AC022

Filtre double bande isolant les longueurs d'onde hydrogène alpha (656.3nm) et oxygène III (500.7nm) Bande passante étroite de 12nm qui augmente ne...

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$399.00 - $399.00
$399.00
$399.00 - $399.00
$399.00
$478.00 - $478.00
$478.00
$478.00 - $478.00
$478.00

William Optics Filtre Bande Étroite STC Astro Duo

WO-YF-STC-ADN

Filtre passe-bande double pour l'astrophotographie Optimisé pour les raies d'émission H-alpha et OIII Description ...

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$478.00 - $478.00
$478.00
$478.00 - $478.00
$478.00
$238.00 - $238.00
$238.00
$238.00 - $238.00
$238.00

William Optics Filtre Multispectre STC Ultra Layer Astro - 48mm

WO-YF-STC-M48

Filtre passe-bande multi pour l'astrophotographie Conception filetée de 48 mm pour une fixation facile Description ...

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$238.00 - $238.00
$238.00
$238.00 - $238.00
$238.00
$19.00 - $49.00
$19.00 - $49.00
$19.00 - $49.00
$19.00

ZWO Fenêtre de protection AR

Options available
5 variants in stock

Protège le capteur de la caméra de la poussière et de l'humidité Diamètre de 21mm pour certains modèles de caméras ZWO Traitements antireflet (AR)...

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$19.00 - $49.00
$19.00 - $49.00
$19.00 - $49.00
$19.00
$99.00 - $169.00
$99.00 - $169.00
$99.00 - $169.00
$99.00

ZWO Filtre bi-bande

Options available
7 variants in stock

Laisse passer les longueurs d'onde H-alpha (15nm) et OIII (35nm) Conçu pour les caméras couleur (OSC) Monture filetée 1.25" Transmission supérieur...

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$99.00 - $169.00
$99.00 - $169.00
$99.00 - $169.00
$99.00
$29.00 - $29.00
$29.00
$29.00 - $29.00
$29.00

ZWO Filtre passe IR 850nm - 1.25"

ZWO-850IR1-25
2 en stock

Laisse passer la lumière infrarouge > 850nm Stabilise nettement les images planétaires par forte turbulence Permet l'imagerie planétaire et lun...

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$29.00 - $29.00
$29.00
$29.00 - $29.00
$29.00
$19.00 - $19.00
$19.00
$19.00 - $19.00
$19.00

ZWO Fenêtre de protection IR-cut

Options available

Fenêtre de protection de 21 mm de diamètre pour certaines caméras ZWO Le filtre UV/IR-cut intégré préserve un équilibre des couleurs naturel Plané...

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$19.00 - $19.00
$19.00
$19.00 - $19.00
$19.00
$148.00 - $299.00
$148.00 - $299.00
$148.00 - $299.00
$148.00

ZWO Filtres LRGB optimisés

Options available
3 variants in stock

Jeu de filtres filetés 1.25" (31.75mm) Transmission supérieure à 92% dans la bande passante Pondération des poses RGB équilibrée 1:1:1 Verre optiq...

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$148.00 - $299.00
$148.00 - $299.00
$148.00 - $299.00
$148.00
$369.00 - $699.00
$369.00 - $699.00
$369.00 - $699.00
$369.00

ZWO Jeu de filtres à bande étroite - 7nm H-alpha, OIII et SII

Options available
1 variants in stock

Comprend des filtres H-alpha, OIII et SII 1.25" Bande passante de 7nm pour une imagerie à fort contraste Idéal pour créer des images en « palette ...

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$369.00 - $699.00
$369.00 - $699.00
$369.00 - $699.00
$369.00

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.