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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
Player One Anti-Halo PRO Dual-Band 2″ Ha+OIII filter

Player One Anti-Halo PRO Dual-Band Ha/OIII Filter - 2"

by Player One
SKU POA-AHP-HO-2
$499.00 - $499.00
$499.00
$499.00 - $499.00
$499.00
Price Match Policy!
  • Advanced Halo Suppression: Specifically engineered to eliminate halos around even the brightest stars.
  • Dual-Band Ha+OIII Design: Captures hydrogen-alpha and oxygen-III emission lines simultaneously, ideal for one-shot color cameras.
  • 2-inch Mounted Format: Standard size for use in 2" focusers, filter wheels, and filter drawers.
  • Proven on Fast Optics: Performance validated on an f/4 Newtonian reflector, ensuring compatibility with demanding, fast-ratio systems.
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Anti-Halo PRO Dual-Band 2″ Ha+OIII filter

    The Anti-Halo PRO Dual-Band 2″ Ha+OIII filter is engineered to solve the single most persistent artifact in modern narrowband astrophotography: distracting halos around bright stars. Its effectiveness was proven in a demanding test on Vega, a magnitude 0 star, where a 120-second exposure with an 8" f/4 Newtonian produced a clean, halo-free stellar profile.

    Tested on Vega: Zero Halos on a Magnitude 0 Star

    Many filters fail when imaging targets near bright stars. The Anti-Halo PRO was subjected to a worst-case scenario: a 120-second exposure of Vega, one of the brightest stars in the night sky, using a fast 8" f/4 Newtonian telescope. The result is a complete absence of the characteristic halo that plagues other narrowband and dual-band designs, proving its ability to maintain image integrity under the most challenging conditions.

    Dual-Band Capture for Light-Polluted Skies

    Designed for one-shot color cameras (DSLR, Mirrorless, and dedicated OSC astro cameras), this filter isolates the two most prominent emission nebula wavelengths—Hydrogen-alpha and Oxygen-III. This allows you to capture high-contrast nebula data from suburban skies in a single set of exposures, dramatically simplifying your imaging workflow and processing time compared to monochrome filter sets.

    Anti-Halo PRO vs. Conventional Filters: A Critical Difference

    While many filter manufacturers focus exclusively on achieving narrower bandpasses, this often comes at the cost of increased internal reflections, resulting in prominent halos. The Anti-Halo PRO prioritizes clean optical performance across the entire frame. It delivers the high-contrast, light-pollution-blocking benefits of a dual-band filter without forcing you to compromise on star quality, making it the superior choice for images containing bright, high-magnitude stars.

  • What makes the Anti-Halo PRO Dual-Band filter different from other Ha+OIII filters?

    Its primary design goal is halo suppression. While other filters focus solely on narrow bandpass, they can introduce severe halos around bright stars. The Anti-Halo PRO uses advanced coating techniques to eliminate these artifacts, ensuring clean stars even in fields with high-magnitude objects.

    Is the Anti-Halo PRO filter suitable for my DSLR or one-shot color camera?

    Yes, it is ideal for these cameras. The filter was tested using a Canon 700D DSLR. It passes both the red H-alpha and blue-green OIII wavelengths, allowing a standard color sensor to capture detailed nebula data in a single shot from light-polluted locations.

    How will the Anti-Halo PRO filter perform on a target like the Orion Nebula (M42)?

    This is an excellent use case. The Anti-Halo PRO filter will allow you to capture the faint outer nebulosity of M42 while keeping the bright stars of the Trapezium cluster sharp and free of distracting halos. This preserves the high dynamic range of the target without introducing artifacts.

    What is the ideal focal ratio for the Anti-Halo PRO filter?

    The filter has been proven to work exceptionally well on fast f/4 systems, which are often the most challenging for filters due to the steep light cone angles. This indicates it will perform robustly on a wide range of telescope focal ratios, from fast Newtonians to slower refractors and SCTs.

    If I image the Veil Nebula (NGC 6960) near the star 52 Cygni, will this filter prevent halos?

    Yes, this is exactly the type of scenario the Anti-Halo PRO is designed for. It will suppress the halo from the bright star 52 Cygni, allowing the delicate, filamentary structure of the Witch's Broom Nebula to be captured cleanly without being overwhelmed by filter-induced artifacts.

    Can I use the Anti-Halo PRO filter for visual observing?

    No, this is an imaging-only filter. Narrowband and dual-band filters have very restrictive bandpasses that are too dim for the human eye. They are designed for long-exposure astrophotography with a camera.

  • Size 2"

    • Anti-Halo PRO Dual-Band 2" Filter

      × 1

    • Protective Case

      × 1

  • Player One 2-Year Warranty