Optolong L-Ultimate 2 Dual Bandpass Light Pollution Reduction Imaging Filter

Key Benefits

• 🌌 Dual Bandpass Design — 3nm dual-band filter isolates nebulae emissions into H-Alpha (red) at 656.3nm and OIII (green-blue) at 500.7nm.
• 🌃 Light Pollution Blocking — Blocks light pollution from mercury vapor lamps, high/low pressure sodium vapor lights, and neutral oxygen emissions.
• 📊 Signal Maximization — Maximizes transmission of main nebula emission lines while darkening sky background for enhanced contrast.
• 🔭 Multi-Camera Compatible — Works with DSL, color/MONO CMOS, and CCD cameras for versatile astronomical imaging.
• ✨ Emission Line Isolation — Only allows H-Alpha (656.3nm) and OIII (500.7nm) emission lines through, eliminating other light pollution.
• ⚠️ Fast Ratio Limitation — Not suitable for fast ratio optical systems due to its narrowband characteristics.