Passer au contenu
Égalisation des prix Retours sous 30 jours* Parlez à un astronome avant d'acheter

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

$255.00 - $490.00
$255.00 - $490.00
$255.00 - $490.00
$255.00

Antlia Filtre à bande étroite H-alpha Pro de 3nm

Options available
8 variants in stock

Longueur d'onde centrale H-alpha de 656,3 nm Petit FHWM de 3 nm Transmission de crête élevée > 88 % Halos minimisés sur les étoiles b...

Afficher tous les détails
$255.00 - $490.00
$255.00 - $490.00
$255.00 - $490.00
$255.00
$268.00 - $515.00
$268.00 - $515.00
$268.00 - $515.00
$268.00

Antlia 3nm Narrowband H-alpha Pro Highspeed Filter - f/2.6 to f/3.6

Options available
1 variants in stock

Pre-shifted 656.3nm H-alpha Central Wavelength for High-Speed Systems Optimized 3nm FHWM for f/2.6–f/3.6 High >90% Peak Transmission Enhanced S...

Afficher tous les détails
$268.00 - $515.00
$268.00 - $515.00
$268.00 - $515.00
$268.00
$255.00 - $490.00
$255.00 - $490.00
$255.00 - $490.00
$255.00

Antlia Filtre à bande étroite OIII Pro de 3nm

Options available
8 variants in stock

Le filtre à bande étroite Antlia OIII Pro optimise le FWHM (pleine largeur moitié maximum) à 3 nm passe-bande . Au fur et à mesure que la bande pa...

Afficher tous les détails
$255.00 - $490.00
$255.00 - $490.00
$255.00 - $490.00
$255.00
$268.00 - $515.00
$268.00 - $515.00
$268.00 - $515.00
$268.00

Antlia 3nm Narrowband OIII Pro Highspeed Filter - f/2.6 to f/3.6

Options available
1 variants in stock

Pre-shifted 500.7nm OIII Central Wavelength for High-Speed Systems Optimized 3nm FHWM for f/2.6–f/3.6 High >90% Peak Transmission Enhan...

Afficher tous les détails
$268.00 - $515.00
$268.00 - $515.00
$268.00 - $515.00
$268.00
$255.00 - $490.00
$255.00 - $490.00
$255.00 - $490.00
$255.00

Antlia Filtre à bande étroite SII Pro de 3nm

Options available
7 variants in stock

Le filtre à bande étroite Antlia SII Pro optimise le FWHM (pleine largeur moitié maximum) à une bande passante de 3 nm. Au fur et à mesure que la ...

Afficher tous les détails
$255.00 - $490.00
$255.00 - $490.00
$255.00 - $490.00
$255.00
$265.20 - $509.90
$265.20 - $509.90
$265.20 - $509.90
$265.20

Antlia 3nm Narrowband SII Pro Highspeed Filter - f/2.6 to f/3.6

Options available
1 variants in stock

Longueur d'onde centrale SII pré-décalée à 673.6nm pour les systèmes rapides FWHM de 3nm optimisée pour f/2.6–f/3.6 Transmission maximale él...

Afficher tous les détails
$265.20 - $509.90
$265.20 - $509.90
$265.20 - $509.90
$265.20
$185.00 - $350.00
$185.00 - $350.00
$185.00 - $350.00
$185.00

Antlia Filtre à bande étroite H-alpha Edge de 4.5nm

Options available
8 variants in stock

Le filtre à bande étroite Antlia H-alpha EDGE optimise le FWHM (pleine largeur demi-maximum) à une bande passante de 4,5 nm. La suppression de la...

Afficher tous les détails
$185.00 - $350.00
$185.00 - $350.00
$185.00 - $350.00
$185.00
$185.00 - $350.00
$185.00 - $350.00
$185.00 - $350.00
$185.00

Antlia Filtre à bande étroite OIII Edge de 4.5nm

Options available
8 variants in stock

Le filtre à bande étroite Antlia OIII EDGE optimise le FWHM (pleine largeur demi-maximum) à une bande passante de 4,5 nm. La suppression de la de...

Afficher tous les détails
$185.00 - $350.00
$185.00 - $350.00
$185.00 - $350.00
$185.00
$185.00 - $350.00
$185.00 - $350.00
$185.00 - $350.00
$185.00

Antlia Filtre à bande étroite SII Edge de 4.5nm

Options available
7 variants in stock

Le filtre à bande étroite Antlia SII EDGE optimise le FWHM (pleine largeur demi-maximum) à une bande passante de 4,5 nm. La suppression de la den...

Afficher tous les détails
$185.00 - $350.00
$185.00 - $350.00
$185.00 - $350.00
$185.00
$390.00 - $390.00
$390.00
$390.00 - $390.00
$390.00

Antlia ALP-T Dual Band Ha&OIII 3nm

ANT-ALP-T-3NM-HAOIII
4 en stock

Precise Narrowband Filtering for Exceptional Contrast Enhanced Transmission for Superior Signal-to-Noise Ratio ...

Afficher tous les détails
$390.00 - $390.00
$390.00
$390.00 - $390.00
$390.00
$710.00 - $710.00
$710.00
$710.00 - $710.00
$710.00

Antlia ALP-T Dual Band Ha&OIII 3nm + SII&Hb 3.5nm 2" Filter Set

ANT-ALP-T-3NM-KIT

Precise Narrowband Filtering for Exceptional Contrast Enhanced Transmission for Superior Signal-to-Noise Ratio ...

Afficher tous les détails
$710.00 - $710.00
$710.00
$710.00 - $710.00
$710.00
$360.00 - $360.00
$360.00
$360.00 - $360.00
$360.00

Antlia ALP-T Dual Band SII&Hβ 3.5nm

ANT-ALP-T-3NM-SIIHB
2 en stock

Precise Narrowband Filtering for Exceptional Contrast Enhanced Transmission for Superior Signal-to-Noise Ratio Anti-Reflection Coating to Reduce H...

Afficher tous les détails
$360.00 - $360.00
$360.00
$360.00 - $360.00
$360.00
$690.00 - $690.00
$690.00
$690.00 - $690.00
$690.00

Antlia Kit de filtres duoband ALP-T 5nm Ha/OIII et SII/Hb - 2"

ANT-ALP-T-SET

$690.00 - $690.00
$690.00
$690.00 - $690.00
$690.00
$380.00 - $380.00
$380.00
$380.00 - $380.00
$380.00

Antlia Filtre duoband ALP-T Ha/OIII de 5nm

ANT-ALP-T-2

L' Antlia ALP-T double bande 5 nm Le filtre Ha&OIII est un filtre passe-ligne double conçu pour être utilisé principalement avec les appareil...

Afficher tous les détails
$380.00 - $380.00
$380.00
$380.00 - $380.00
$380.00
$380.00 - $380.00
$380.00
$380.00 - $380.00
$380.00

Antlia Filtre duoband ALP-T haute vitesse Ha/OIII de 5nm

ANT-ALP-T-HS-2

Les filtres haute vitesse ALP-T double bande 5 nm sont encore optimisés pour fonctionner avec des systèmes d'imagerie à haute vitesse en décalant...

Afficher tous les détails
$380.00 - $380.00
$380.00
$380.00 - $380.00
$380.00
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00

Antlia Filtre duoband ALP-T SII/Hb de 5nm

ANT-ALP-T-SII-HB-2

Le filtre SII&Hb double bande 5 nm ALP-T est un filtre passe-ligne double, qui laisse passer la ligne rouge foncé Sulphur-II et la ligne bleu...

Afficher tous les détails
$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00
$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00

Antlia Filtre IR-Pass 685nm - 1.25"

ANT-IR685
3 en stock

Le filtre Antlia IR Pass 685 nm est un filtre absorbant qui laisse passer la lumière infrarouge avec des longueurs d'onde supérieures à 685 nm. À...

Afficher tous les détails
$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00

Antlia Filtre IR-Pass 850nm - 1.25"

ANT-IR850
3 en stock

Le filtre Antlia IR Pass 850 nm est un filtre absorbant qui laisse passer la lumière infrarouge avec des longueurs d'onde supérieures à 850 nm. I...

Afficher tous les détails
$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00
$300.00 - $600.00
$300.00 - $600.00
$300.00 - $600.00
$300.00

Antlia Kit de filtres LRGB-V Pro

Options available
8 variants in stock

Les filtres de la série Antlia LRGB-V Pro sont conçus pour les caméras monochromes qui utilisent à la fois des capteurs CCD et CMOS. Les capteurs ...

Afficher tous les détails
$300.00 - $600.00
$300.00 - $600.00
$300.00 - $600.00
$300.00
$198.00 - $198.00
$198.00
$198.00 - $198.00
$198.00

Antlia Filtre Quad Band anti-pollution lumineuse - 2"

ANT-QUAD-2
5 en stock

Le filtre anti-pollution lumineuse Antlia Quad Band est un filtre de suppression de lumière pour les caméras couleur et monochromes. Il est capabl...

Afficher tous les détails
$198.00 - $198.00
$198.00
$198.00 - $198.00
$198.00
$179.00 - $179.00
$179.00
$179.00 - $179.00
$179.00

Antlia Filtre Triband RGB Ultra

ANT-TRIBAND-V2
4 en stock

Transmission améliorée pour un rapport signal sur bruit supérieur Traitement antireflet pour réduire les halos Optimisé pour les optiques rapides ...

Afficher tous les détails
$179.00 - $179.00
$179.00
$179.00 - $179.00
$179.00
$1,186.70 - $1,186.70
$1,186.70
$1,186.70 - $1,186.70
$1,186.70

Askar 3nm Colour Magic Ha/OIII & SII/OIII (E1+E2) Filter Package

ASK-CM-E1E2
1 en stock

Enables SHO "Hubble Palette" imaging with a one-shot-color (OSC) camera Includes two 3nm dual-bandpass filters: E1 (Hα+OIII) and E2 (SII+OIII) Iso...

Afficher tous les détails
$1,186.70 - $1,186.70
$1,186.70
$1,186.70 - $1,186.70
$1,186.70
$605.00 - $605.00
$605.00
$605.00 - $605.00
$605.00

Askar 3nm Colour Magic Ultra Ha/OIII E1 Filter - 2"

ASK-ASKAR2DBE1
1 en stock

Dual-bandpass for Hydrogen-alpha (656.6nm) and Oxygen-III (500.7nm) Ultra-narrow 3.7nm (Ha) and 4.0nm (OIII) FWHM bandwidths 85% peak transmittanc...

Afficher tous les détails
$605.00 - $605.00
$605.00
$605.00 - $605.00
$605.00
$599.01 - $599.01
$599.01
$599.01 - $599.01
$599.01

Askar 3nm Colour Magic Ultra OIII/SII E2 Filter - 2"

ASK-ASKAR2DBE2
1 en stock

Dual-bandpass design captures OIII (500.7nm) and SII (672nm) simultaneously Narrow 3.7nm (OIII) and 4.0nm (SII) FWHM for high-contrast imaging Pea...

Afficher tous les détails
$599.01 - $599.01
$599.01
$599.01 - $599.01
$599.01

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.