Antlia Triband RGB Ultra II Filter 2"

Antlia Triband RGB Ultra II Filter

The Antlia Triband RGB Ultra II Filter introduces the H-Beta (486.1 nm) line, enhancing the ability to capture finer details in nebulae. It is specifically designed for light pollution suppression and is compatible with both OSC (One-Shot Color) and Mono cameras.

Its spectral design targets the most information-rich RGB bands, making it possible to capture over 90% of deep-sky objects. Unlike traditional ultra-narrowband filters, it excels not only in emission nebulae imaging but also in galaxies, reflection nebulae, and star clusters, delivering a more balanced RGB color representation.

Additionally, it features a broad bandpass optimized for fast optical systems, supporting focal ratios as fast as f/2.

Applications & Performance

✔ Ideal for capturing galaxies, reflection nebulae, and star clusters

✔ Refined coating process ensures excellent halo suppression and improves signal-to-noise ratio (SNR)

✔ Balanced color transmission, leveraging Antlia’s expertise in spectral design

✔ Minimized color shift for broadband emission objects such as stars, galaxies, and globular clusters

✔ Compatible with most fast optical systems (down to f/2), with minimal efficiency loss and no spectral shift

✔ Optimized for visual use: Provides high transmittance for H-alpha, SII, OIII, and H-Beta (HSOHb) emission lines, making it suitable for observing deep-sky objects with large-diameter telescopes

✔ Better isolation of H-alpha, OIII, and the blue spectrum from background light pollution

✔ High flexibility and compatibility, suitable for both OSC and Mono cameras

✔ Works with all optical setups down to f/2, ensuring versatility in astrophotography

✔ Can replace a luminance (L) filter when shooting LRGB with a mono camera, enhancing contrast and signal-to-noise ratio for nebulae and galaxies (except dark nebulae, LDN)