H-alpha filter 7nm Prime - 36mm (unmounted)

Antlia H-alpha 7nm Prime filter

Treat yourself to high-precision imaging of H-alpha and NII nebulae with the Antlia 7nm Prime filter. Designed to excel with fast lenses up to f/2, it combines high transmission and noise control for optimum astrophotography results.

Key features

• High transmission (>90% at 656.3nm) to capture maximum H-alpha signal.
• Bandwidth 7nm to efficiently transmit NII lines at 654.8nm and 658.3nm.
• OD4 deletion out-of-band to minimize stray light interference.
• Compatible with high-speed optics up to f/2 without significant signal loss.
• One-piece design to eliminate internal reflections and limit halos around bright stars.

Ideal applications

• Imaging H-alpha and NII nebulae
• Planetary nebulae, Wolf-Rayet, supernova remnants
• Astrophotography in light-polluted areas or dark sites

Technical specifications

Available formats

• Unmounted: Ø36mm

Robust design

• Optical surface treated to reduce scratching
• Blackened edges eliminate internal reflections
• Spectral profile with abrupt cut-off to reduce stellar halos

Safety warning

Warning: never look directly at the Sun with this filter. This would cause serious eye damage.