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.

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$192.00 - $883.00

$192.00

Baader Photometric SLOAN/SDSS g' Individual Filter

Options available

SLOAN/SDSS g' Bandpass: Conforms to the modern standard for astronomical photometry. Photometric Grade: Produces scientifically valid data for r...

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$192.00 - $883.00

$192.00

$192.00 - $883.00

$192.00

Baader Photometric SLOAN/SDSS i' Individual Filter

Options available

SLOAN/SDSS i' Standard: Conforms to the standardized Sloan Digital Sky Survey photometric system for consistent, comparable scientific data. Pho...

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$192.00 - $883.00

$192.00

$192.00 - $883.00

$192.00

Baader Photometric SLOAN/SDSS r' Individual Filter

Options available

Conforms to the scientific SLOAN/SDSS r' photometric system Engineered for professional and amateur astronomical research Available in 8 formats, ...

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$192.00 - $883.00

$192.00

$199.00 - $893.00

$199.00

Baader Photometric SLOAN/SDSS u' Individual Filter

Options available

Standardized SLOAN/SDSS u'-band photometric filter Isolates the near-ultraviolet (UV) spectrum for scientific analysis Designed for repeatable, hi...

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$199.00 - $893.00

$199.00

$960.00 - $4,634.00

$960.00

Baader Photometric SLOAN/SDSS ugriz' Filter Set

Options available

Conforms to the Sloan Digital Sky Survey (SDSS) photometric system Includes five filters: u' (ultraviolet), g' (green), r' (red), i' (infrared), a...

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$960.00 - $4,634.00

$960.00

$182.00 - $883.00

$182.00

Baader Photometric SLOAN/SDSS y' Individual Filter

Options available

Conforms to the SLOAN/SDSS y' photometric standard Designed for scientific magnitude measurements Ideal for variable star and exoplanet transit re...

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$182.00 - $883.00

$182.00

$182.00 - $883.00

$182.00

Baader Photometric SLOAN/SDSS z-s' Individual Filter

Options available

Photometric filter for the SLOAN/SDSS z-s' bandpass Conforms to the Sloan Digital Sky Survey photometric system standard Enables calibrated, scien...

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$182.00 - $883.00

$182.00

$856.00 - $3,863.00

$856.00

Baader Photometric UBVRI Filter Set

Options available

Standardized UBVRI Bessel passbands for scientific photometry Enables measurement of variable stars, asteroids, and exoplanet transits Precision p...

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$856.00 - $3,863.00

$856.00

$183.00 - $873.00

$183.00

Baader Photometric UBVRI-B Individual Filter

Options available

Conforms to the standardized Johnson-Cousins/Bessel B-band passband Designed for research-grade scientific photometry Advanced anti-reflection and...

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$183.00 - $873.00

$183.00

$207.00 - $940.00

$207.00

Baader Photometric UBVRI-I Individual Filter

Options available

Conforms to the Johnson-Cousins UBVRI Photometric System Optimized for the Bessel I-Band (Infrared) Homofocal Design for Parfocal Operation with o...

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$207.00 - $940.00

$207.00

$183.00 - $873.00

$183.00

Baader Photometric UBVRI-R Individual Filter

Options available

Conforms to the Johnson-Cousins-Bessel R-Band Photometric Standard Engineered for Scientific Photometry and Data Collection Plane-Parallel Substra...

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$183.00 - $873.00

$183.00

$207.00 - $940.00

$207.00

Baader Photometric UBVRI-U Individual Filter

Options available

1 variants in stock

Conforms to the Johnson-Cousins/Bessel U-Band Photometric Standard Designed for Scientific Photometry of Variable Stars and Stellar Classification...

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$207.00 - $940.00

$207.00

$183.00 - $873.00

$183.00

Baader Photometric UBVRI-V Individual Filter

Options available

1 variants in stock

Bessel V-Band Standard: Precisely conforms to the internationally recognized Johnson-Cousins-Bessel V-band for consistent, scientific-grade magni...

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$183.00 - $873.00

$183.00

Baader Planetarium Baader 3.5 / 4nm f/3 Ultra-Highspeed Filter-Set 1.25" – CMOS-optimized (H-alpha / O-III / S-II)

$929.00 - $1,971.00

$929.00

Baader Planetarium 3.5 / 4nm f/3 Ultra-Highspeed Filter-Set – CMOS-optimized (H-alpha / O-III / S-II)

Options available

3.5 / 4nm Ultra-Narrow H-alpha, O-III & S-II Bandpasses Pre-Shifted for Fast f/3 "Ultra-Highspeed" Optical Systems CMOS-Optimized with Anti-Re...

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$929.00 - $1,971.00

$929.00

Baader Planetarium Baader FCCT 2" Unmounted Clearglass Filter (Ø 47.4 mm)

$77.00 - $77.00

$77.00

$77.00 - $77.00

$77.00

Baader Planetarium FCCT 2" Unmounted Clearglass Filter (Ø 47.4 mm)

BAA-2458416U

2-inch (47.4 mm) unmounted clearglass filter Designed to be parfocal with other Baader narrowband filters CMOS-optimized anti-reflection coatings ...

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$77.00 - $77.00

$77.00

$77.00 - $77.00

$77.00

Baader Planetarium Baader H-alpha 1.25" Bandpass Filter (20nm)

$115.00 - $201.00

$115.00

Baader Planetarium H-alpha Bandpass Filter (20nm)

Options available

H-alpha Bandpass Filter in 1.25" & 2" Sizes 20nm FWHM Bandwidth 656.3nm Center Wavelength Optimized for Color CMOS/CCD Cameras High-Contrast f...

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$115.00 - $201.00

$115.00

Baader Planetarium Baader H-alpha 1.25" f/2 Highspeed-Filter (6.5nm) – CMOS-optimized

$199.00 - $487.00

$199.00

Baader Planetarium H-alpha f/2 Highspeed-Filter (6.5nm) – CMOS-optimized

Options available

Engineered for ultra-fast f/2 optical systems 6.5nm H-alpha bandpass for high-contrast imaging CMOS-optimized to suppress halos and internal refle...

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$199.00 - $487.00

$199.00

Baader Planetarium Baader H-alpha 1.25" f/2 Ultra-Highspeed-Filter (3.5nm) – CMOS-optimized

$363.00 - $873.00

$363.00

Baader Planetarium H-alpha f/2 Ultra-Highspeed-Filter (3.5nm) – CMOS-optimized

Options available

Engineered for f/2 ultra-highspeed optical systems 3.5nm bandpass for maximum H-alpha contrast CMOS-optimized with anti-reflection coatings Availa...

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$363.00 - $873.00

$363.00

Baader Planetarium Baader H-alpha 1.25" f/3 Ultra-Highspeed-Filter (3.5nm) – CMOS-optimized

$347.00 - $770.00

$347.00

Baader Planetarium H-alpha f/3 Ultra-Highspeed-Filter (3.5nm) – CMOS-optimized

Options available

3.5nm H-alpha Bandpass Optimized for f/3 Ultra-High-Speed Systems Available in 1.25" & 2" mounted, 31mm, 36mm & 50.4mm round unmounted, an...

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$347.00 - $770.00

$347.00

Baader Planetarium Baader H-alpha 1.25" Ultra-Narrowband-Filter (3.5nm) – CMOS-optimized

$352.00 - $795.00

$352.00

Baader Planetarium H-alpha Ultra-Narrowband-Filter (3.5nm) – CMOS-optimized

Options available

3.5nm Ultra-Narrow Bandpass Available in 1.25" & 2" mounted, 31mm, 36mm & 50.4mm round unmounted, and 50x50mm & 65x65mm square sizes C...

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$352.00 - $795.00

$352.00

Baader Planetarium Baader H-Beta 1.25" Narrowband Filter (5.5nm) – CMOS-optimized

$244.00 - $559.00

$244.00

Baader Planetarium H-Beta Narrowband-Filter (5.5nm) – CMOS-optimized

Options available

Isolates Hydrogen-Beta (H-Beta) Emission Line 5.5nm FWHM Narrowband Passband Available in 1.25" & 2" Mounted, 31/36/50.4mm Round Unmounted and...

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$244.00 - $559.00

$244.00

Baader Planetarium Baader O-III 1.25" f/2 Highspeed-Filter (6.5nm) – CMOS-optimized

$199.00 - $479.00

$199.00

Baader Planetarium O-III f/2 Highspeed-Filter (6.5nm) – CMOS-optimized

Options available

6.5nm FWHM Bandpass for O-III Optimized for f/2 to f/3.5 High-Speed Optical Systems Available in 1.25" & 2" Mounted, 31mm, 36mm, 47.4mm (FCCT)...

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$199.00 - $479.00

$199.00

Baader Planetarium Baader O-III 1.25" f/2 Ultra-Highspeed-Filter (4nm) – CMOS-optimized

$333.00 - $669.00

$333.00

Baader Planetarium O-III f/2 Ultra-Highspeed-Filter (4nm) – CMOS-optimized

Options available

4nm FWHM Bandpass Optimized for f/2 Ultra-Highspeed Systems Available in 1.25" & 2" Mounted, 31mm, 36mm, 47.4mm (FCCT) & 50.4mm Round Unmo...

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$333.00 - $669.00

$333.00

Baader Planetarium Baader O-III 1.25" f/3 Ultra-Highspeed-Filter (4nm) – CMOS-optimized

$317.00 - $667.00

$317.00

Baader Planetarium O-III f/3 Ultra-Highspeed-Filter (4nm) – CMOS-optimized

Options available

4nm FWHM Ultra-Narrow Bandpass Optimized for f/3 and Faster Optical Systems Available in 1.25" & 2" Mounted, 31mm, 36mm & 50.4mm Round Unm...

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$317.00 - $667.00

$317.00

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.

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Imaging Filters

Filters

Specialist Imaging Filters

Why Choose David Astro for Imaging Filters

Imaging Filters in Canada — Frequently Asked Questions

Diagnosing an imaging problem?

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