CH4 8nm 1.25 inch Filter E-series

The Player One CH4 8 nm 1.25″ Filter (E-Series) is a high-performance narrowband methane filter, optimized for CMOS/CCD planetary and nebula imaging. The E-Series offers enhanced multi-layer coating and superior optical substrate for increased contrast and durability.

🔑 Key Features

• Size: 1.25″; Thread: M28.5×0.6
• CWL: 889 nm; Bandwidth: 8 nm
• Transmittance: ≈ 90%
• Blocking depth: OD 4.0
• Frame thickness: ~7.5 mm (body 5 mm + thread 2.5 mm); glass thickness: 1.85 mm

✅ Why Choose This Product?

• Excellent contrast:
  890 nm CH4 band enhances planetary and lunar detail in methane-rich targets.
• High throughput:
  ≈90% transmission preserves signal intensity.
• Low-profile design:
  Slim frame (7.5 mm) for minimal spacing in filter drawers or wheels.
• Reliable blocking:
  OD 4 ensures effective elimination of unwanted wavelengths.