Antlia SHO (S-II, H-a & O-III) Narrowband 3nm Pro Imaging Filter Set of 3 Filters - 1.25" Mounted

The Antlia 3nm Narrowband Filter Set is designed for advanced deep-sky astrophotography. This set includes H-Alpha, Sulfur II (SII), and Oxygen III (OIII) 1.25" mounted filters. Each filter delivers high contrast, optimized spectral performance, and excellent suppression of light pollution. Ideal for CCD and CMOS monochrome cameras, these filters enable precise imaging of nebulae, galaxies, and star clusters with enhanced color balance and minimal haloing around bright stars.

• Filter Type: Narrowband
• Bandpass: 3nm (H-Alpha, SII, OIII)
• Mount Size: 1.25" (M28.5 x 0.6)
• Glass Substrate Thickness: 2 mm ±0.05 mm
• Surface Quality: Scratch/Dig 60/40
• Clear Aperture: 25.5 mm
• Parallelism: <30 arcsec
• Warranty: 3 years against delamination
• Edge Blackened: Yes, to eliminate internal reflections
• Application: CCD/CMOS monochrome cameras (not for visual or solar use)

• 1x Antlia 3nm Narrowband H-Alpha (Ha) 1.25" Mounted Filter
• 1x Antlia 3nm Narrowband Sulfur II (SII) 1.25" Mounted Filter
• 1x Antlia 3nm Narrowband Oxygen III (OIII) 1.25" Mounted Filter