Anti-Halo PRO Dual-Band 2 inch Ha+OIII filter

The Player One Anti-Halo PRO Dual-Band 2″ Ha+OIII filter is a precision narrowband solution for OSC astrophotography, engineered to isolate Hα and OIII emissions while minimizing star halos. It delivers astronomically accurate contrast and darker backgrounds even in challenging imaging environments.

🔑 Key Features

• Hα: CWL 656.3 nm, Bandwidth 3.7 ± 0.5 nm
• OIII: CWL 500.7 nm, Bandwidth 3.2 ± 0.5 nm
• High transmission: ≥ 85% at both wavelengths
• Blocking depth: OD 5 across 200-1100 nm
• Frame thickness ~7.5 mm (body 5 mm + thread 2.5 mm); glass thickness 1.85 mm
• Advanced multi-layer coating suppresses halos, even around Vega-brightness stars

✅ Why Choose This Product?

• Superior halo suppression:
  Advanced coating eliminates reflection halos common with bright stars.
• Dual-band convenience:
  Combines Hα and OIII in one filter-ideal for OSC systems and deep-sky imaging.
• High signal efficiency:
  Transmission ≥ 85% ensures strong nebular capture even under light pollution.
• Low-profile design:
  7.5 mm total thickness fits smoothly into KF-MW and filter drawer systems.