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Antlia

Antlia

In the era of high-quantum-efficiency CMOS sensors, Antlia has established itself as a leading manufacturer of astronomical filters that balance precision, performance, and value. Known for tight 3nm and 4.5nm narrowband tolerances, advanced coating technology, and the specialized LRGB-V Pro series, Antlia filters are engineered to maximize signal-to-noise ratio while minimizing halos and unwanted reflections. Designed for both light-polluted and dark-sky environments, they deliver high transmission of key emission lines with effective suppression of unwanted wavelengths. At David Astro, we carry an extensive in-stock inventory of Antlia filters, helping you capture cleaner data and achieve consistent, high-quality imaging results.

Filters

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

Antlia 3nm Narrowband H-alpha Pro Filter

Options available
3 variants in stock

656.3nm H-alpha Central Wavelength Small 3nm FHWM High >88% Peak Transmission Minimized halos on bright stars Description Specificat...

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$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...

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$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 3nm Narrowband OIII Pro Filter

Options available
3 variants in stock

Antlia OIII Pro narrowband filter optimizes the FWHM (full width half maximum) to 3nmbandpass. As the bandwidth becomes narrower, the 3nm Pro narro...

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$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...

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$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 3nm Narrowband SII Pro Filter

Options available
3 variants in stock

Antlia SII Pro narrowband filter optimizes the FWHM (full width half maximum) to 3nm bandpass. As the bandwidth becomes narrower, the 3nm Pro narro...

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$255.00 - $490.00
$255.00 - $490.00
$255.00 - $490.00
$255.00
$269.10 - $517.38
$269.10 - $517.38
$269.10 - $517.38
$269.10

Antlia 3nm Narrowband SII 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...

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$269.10 - $517.38
$269.10 - $517.38
$269.10 - $517.38
$269.10
$185.00 - $350.00
$185.00 - $350.00
$185.00 - $350.00
$185.00

Antlia 4.5nm Narrowband H-alpha Edge Filter

Options available
5 variants in stock

Antlia H-alpha EDGE narrowband filter optimizes the FWHM (full width half maximum) to 4.5nm bandpass. The suppression of optical density (OD)5 on ...

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$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 4.5nm Narrowband OIII Edge Filter

Options available
4 variants in stock

Antlia OIII EDGE narrowband filter optimizes the FWHM (full width half maximum) to 4.5nm bandpass. The suppression of optical density (OD)5 on unw...

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$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 4.5nm Narrowband SII Edge Filter

Options available
4 variants in stock

Antlia SII EDGE narrowband filter optimizes the FWHM (full width half maximum) to 4.5nm bandpass. The suppression of optical density (OD)5 on unwa...

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$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

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

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$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 ...

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$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 in stock

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

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$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 ALP-T Dualband 5nm Ha/OIII and SII/Hb Filter Set - 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 ALP-T Dualband 5nm Ha/OIII Filter

ANT-ALP-T-2

The Antlia ALP-T dual band 5nm Ha&OIII filter is a dual line-pass filter which was designed to be used primarily with one-shot color (OSC) cam...

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$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 ALP-T Dualband 5nm Ha/OIII Highspeed Filter

ANT-ALP-T-HS-2
1 in stock

ALP-T Dual Band 5nm Highspeed Filters are further optimized to work with high-speed imaging systems by shifting slightly the passband and center w...

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$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 ALP-T Dualband 5nm SII/Hb Filter

ANT-ALP-T-SII-HB-2

The ALP-T dual band 5nm SII&Hb filter is a dual line-pass filter, which lets the deep red Sulfur-II line and the blue Hydrogen-Beta line throu...

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$350.00 - $350.00
$350.00
$350.00 - $350.00
$350.00
$169.00 - $169.00
$169.00
$169.00 - $169.00
$169.00

Antlia CH4 Methane Filter - 1.25"

ANT-CH4

Antlia methane (CH4) filter is a specialized filter that allows light in the near infrared portion of the spectrum centered at 889nm to pass throug...

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

Antlia H-beta and OIII Visual Filter - 1.25"

ANT-HB-OIII-1.25
1 in stock

Antlia HB-OIII filter is engineered specifically for night visual nebulae observation at a high contrast and Deep-sky astrophotography. Its transm...

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$99.00 - $99.00
$99.00
$99.00 - $99.00
$99.00
$339.00 - $339.00
$339.00
$339.00 - $339.00
$339.00

Antlia Imaging Herschel Wedge with CaK 3nm Filter - 1.25"

ANT-CAK-WEDGE

Antlia Imaging Herschel Wedge with 35mm Prism and 1.25'' Cak 3nm Solar Filter The Antlia Solar Wedge (Herschel Wedge design) replaces the standard...

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$339.00 - $339.00
$339.00
$339.00 - $339.00
$339.00
$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00

Antlia IR Pass 685nm Filter - 1.25"

ANT-IR685
1 in stock

The Antlia IR Pass 685nm filter is an absorptive filter that allows infrared light with wavelengths of more than 685nm to pass through. At these l...

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$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 IR Pass 850nm Filter - 1.25"

ANT-IR850
1 in stock

The Antlia IR Pass 850nm filter is an absorptive filter that allows infrared light with wavelengths of more than 850nm to pass through. It is a su...

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$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 LRGB-V Pro Filter Set

Options available
3 variants in stock

The Antlia LRGB-V Pro series filters are designed for monochrome cameras that use both CCD and CMOS sensors. Suitable sensors include KAF/KAI senso...

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$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 Quad Band Light Pollution Filter - 2"

ANT-QUAD-2
1 in stock

The Antlia Quad Band Anti-Light Pollution Filter is a light suppression filter for color and monochrome cameras. It is able to shoot most deep sky...

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$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 Triband RGB Ultra Filter V2

ANT-TRIBAND-V2
1 in stock

Enhanced Transmission for Superior Signal-to-Noise Ratio Anti-Reflection Coating to Reduce Halo Effect Optimized for Fast Optics up to f/2 Desc...

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$179.00 - $179.00
$179.00
$179.00 - $179.00
$179.00

High-Contrast Narrowband Imaging

Antlia’s narrowband filters are engineered with steep spectral profiles and high optical density (OD) blocking to isolate faint nebular signal with precision. These filters are well-suited for both traditional refractors and fast optical systems.

  • 3nm Pro & 2.5nm Ultra Series: Ultra-narrow bandpasses for Hydrogen-alpha (Hα), Oxygen-III (OIII), and Sulfur-II (SII), optimized for maximum contrast under light pollution or moonlight.
  • Highspeed Optimized Filters: Designed for fast systems (f/2 to f/3.6), with bandpass shifts to compensate for angle-of-incidence effects in RASA and Hyperstar configurations.
  • 4.5nm EDGE Series: Balanced option offering strong contrast with higher throughput, suitable across a wide range of focal ratios.

LRGB and Multi-Band Solutions

Antlia also provides well-matched broadband and multi-band filters for both mono and one-shot color (OSC) imaging. Their designs focus on consistent color balance and efficient data acquisition.

  • LRGB-V Pro Sets: Optimized for modern CMOS sensors, enabling balanced RGB channels and simplified calibration with consistent exposure ratios.
  • ALP-T Dual Band Filters: Isolate Hα and OIII (or SII and OIII) for OSC imaging, with strong suppression of artificial light sources.
  • Tri-band & Quad-band Filters: Useful for broadband targets in light-polluted environments by selectively transmitting key wavelengths.
  • Specialized Filters: Including IR-pass, Methane (CH4), and Calcium-K (CaK) for planetary and solar system imaging.

Coating Technology and Halo Control

Antlia filters are designed with advanced multi-layer anti-reflective coatings and blackened edges (on unmounted variants) to reduce internal reflections. This minimizes halos around bright stars and improves star profiles, reducing the need for corrective processing.

Why Choose David Astro for Antlia Filters

Selecting the correct filter depends on sensor size, focal ratio, and observing conditions. David Astro provides:

  • Curated Inventory: A wide range of Antlia filters in stock, including narrowband, LRGB, and multi-band options.
  • Technical Guidance: Assistance with filter selection based on your telescope, camera, and sky conditions.
  • System Integration: Support for filter sizing, thickness considerations, and avoiding vignetting in your imaging train.
  • Fast Shipping: Reliable delivery across Canada, the USA, and worldwide.

We help ensure your filter set is matched correctly to your system, so you can collect cleaner data with predictable results.