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Until May 2nd, 2025, orders under US$800 will not incur any duties or taxes upon delivery. Please note that orders under US$800 crossing the Canada-USA border after this date will be subject to duties. They will be billed by the carrier, and you will be responsible to pay them. Prioritize ordering items that are in stock!
Until May 2nd, 2025, orders under US$800 will not incur any duties or taxes upon delivery. Please note that orders under US$800 crossing the Canada-USA border after this date will be subject to duties. They will be billed by the carrier, and you will be responsible to pay them. Prioritize ordering items that are in stock!
Antlia 3nm Narrowband H-alpha Pro Filter

Antlia 3nm Narrowband H-alpha Pro Filter

by Antlia
SKU ANT-HA-3NM-1.25
$0
$255.00 USD - $490.00 USD
$255.00
$255.00 USD - $490.00 USD
$255.00 USD
  • 656.3nm H-alpha Central Wavelength
  • Small 3nm FHWM
  • High >88% Peak Transmission
  • Minimized halos on bright stars
Availability:
2 in stock
Availability:
1 in stock
Availability:
Backordered
Contact us to know when we will receive our next ones!
Check the other options, 2 are in stock!
Availability:
Backordered
Contact us to know when we will receive our next ones!
Check the other options, 2 are in stock!
Availability:
Backordered
Contact us to know when we will receive our next ones!
Check the other options, 2 are in stock!

Free Shipping on most orders above $350*

More information

  • Introducing the Antlia 3nm H-Alpha Pro Filter, the pinnacle of precision for narrowband astrophotography. Engineered to feature a Full Width Half Maximum (FWHM) of just 3nm, this filter dramatically enhances the contrast of emission targets by significantly reducing unwanted background signals. Designed for astrophotographers aiming to capture detailed structures within nebulae, the Antlia H-Alpha 3nm Pro achieves an impressive 88% transmission at the 656.3nm hydrogen-alpha line, ensuring you capture the maximum signal for vivid, well-defined images.

    The Antlia 3nm H-Alpha Pro is optimized for both long focal ratios and fast optical systems, maintaining high transmittance with minimal signal loss even in setups as fast as f/3. This adaptability is bolstered by blue-shift data that confirms compatibility with high-speed systems like Hyperstar and RASA without sacrificing quality. Its exceptional out-of-band blocking, rated at OD5 (0.001%), provides outstanding signal-to-noise ratio and effectively minimizes interference from other wavelengths, sharpening each capture.

    Features

    • Steep Spectral Profile: Minimizes halos around bright stars, enhancing clarity and detail.
    • Single Substrate Design: Eliminates internal reflections, ensuring pure and crisp images.
    • Versatile Application: Ideal for capturing H-alpha emission nebulae, planetary nebulae, Wolf-Rayet nebulae, and supernova remnants. It performs superbly in both light-polluted areas and dark sites, extending imaging opportunities even when the moon is up.
    • Edge Blackening: All filters are edge blackened to eliminate internal reflections from stray light, further improving image quality.
    • Optical Precision: Built on a Schott optical substrate with a surface quality of 60/40 (scratch/dig), a transmitted wavefront of Lambda/4 or better, and parallelism less than 30 arcseconds, it meets stringent standards for optical performance.

    However, it's important to note that the Antlia 3nm H-Alpha Pro filter is specifically tailored for deep sky objects that emit in the hydrogen-alpha line and will not be suitable for objects without H-alpha emissions.

    With its superior design and technological advancements, the Antlia 3nm H-Alpha Pro Filter is an indispensable tool for astrophotographers seeking to push the boundaries of what's visible in the night sky.

    Disclaimer

    This filter is not suitable for solar observation or imaging. H-alpha filters designed for solar applications are significantly narrower and specifically engineered to handle the intense light from the sun. Attempting to use this deep sky astrophotography filter for observing or imaging the sun can result in severe damage to your equipment and pose serious risk of eye injury or blindness. Always ensure that you are using the correct type of filter for solar observation to protect both yourself and your equipment.

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