Filtyro Antlia H-Beta 3nm Pro narrow band Filtyro Antlia H-Beta 3nm Pro - 2'' mounted

Designed to achieve an impressive 88% transmission at the 486.1 nm line, Antlia H-Beta 3nm Pro filters provide maximum signal and well-defined nebula structures. The out-of-band blocking specification is rated at OD5 (0.001%), ensuring excellent signal-to-noise ratio (SNR) and effective cut-off rates to minimize interference from other wavelengths. These enhanced 3nm Pro filters for sharp cut-off astrophotography are specifically designed to reduce halos around bright stars.

The Antlia 3nm Pro series currently comprises Ha, SII, OIII and H-Beta filters that capture exceptionally narrow four-channel data, allowing a wider range of combinations in post-production to meet your diverse requirements.

Importantly, Antlia also offers dual narrowband filters designed for OSC cameras: the ALP-T Dualband Ha&OIII 3nm and the SII&Hb 3.5nm. The synergy of these two dual-band filters allows capturing exceptionally narrowband images with OSC cameras by acquiring spectral data from four channels: Ha, OIII, SII and Hb. Spectra from these four channels can be separated and recombined into various color palettes during post-processing. The resulting images can enhance the luminance contrast in traditional balanced RGB images or facilitate the creation of visuals in various popular false color palettes, such as H-O-Hb, S-H-O, H-S-OHb, H-O-O-O, and others.

Key features and application

• High transmittance and minimum bandwidth to maximize contrast
• Pronounced spectral profile minimizes halos around bright stars
• Single substrate to eliminate internal reflections
• Narrow band objects: H-Beta emission nebulae
• Use in light-polluted areas and dark locations
• Extends imaging time when moon is present
• All Antlia Pro narrowband filters can be used down to f/3 with minimal signal loss
• All unmounted Antlia Narrowband filters are edge-blackened to eliminate internal stray light reflections
• Superior optical reliability reduces image post-processing
• This filter is only effective for deep sky objects containing H-Beta emissions

Antalia H-beta 3 nm technical specifications

Warranty: 3 years against delamination

Available size： 2'' only mounted

Spectral curve

Filter ring:

• 2'' (M48*0.75)
• Ultra-thin filter cell to minimize vignetting by maximizing the clear aperture possible
• Black anodized finish
• Laser engraved with no discoloration

Not recommended:

• Solar imaging
• Night visual observation

Not allowed:

DO NOT LOOK DIRECTLY AT THE SUN WITH THIS FILTER

Failure to observe this warning may result in serious eye injury.