Antlia 4.5nm Edge OIII filter

Antlia OIII 4.5nm EDGE filter

Explore OIII nebulae with unrivalled contrast thanks to the Antlia OIII 4.5nm EDGE filter. Specially designed for deep-sky astrophotography, it maximizes the useful signal while suppressing unwanted noise.

Why choose the Antlia OIII 4.5nm EDGE filter?

• High transmission (>85% at 500.7nm) to capture the faintest structures of OIII nebulae.
• Narrow bandwidth of 4.5nm for exceptional contrast between subject and sky background.
• OD5 deletion unwanted wavelengths to minimize light interference.
• Fast compatibility up to f/3 without significant signal loss.
• Premium manufacturing with one-piece optical substrate, scratch-resistant surface treatment and blackened edges.

Ideal applications

• Imaging OIII nebulae
• Observation of planetary nebulae and Wolf-Rayet
• Capturing supernova remnants
• Imaging polluted skies or dark sites
• Extended imaging time even under moonlight

Filter technical specifications

Available sizes

• Mounted: 1.25″, 2″
• Unmounted: Ø31mm, Ø36mm, Ø50mm

Frame features

• Ultra-thin cell for reduced vignetting
• Black anodized finish for durability
• Weather-resistant laser engraving

Spectral curves

Important notice

Never look directly at the sun with this filter. This would cause serious eye damage.