Antlia Filters CH4 - 1.25": Advanced Methane Imaging for Planetary Observation

The Antlia Filters CH4 - 1.25" Methane Filter is a specialized astronomical tool designed for capturing intricate details and enhanced contrast in planetary imaging. Centered at 889nm in the near-infrared spectrum, this filter's 20nm bandpass is specifically tailored to detect methane signatures characteristic of planets like Jupiter, Mars, and Saturn.

Key Features:

• Narrow Bandpass: Allows light centered at 889nm with a 20nm width, targeting near-infrared wavelengths.
• Planetary Imaging Enhancement: Ideal for capturing fine details and contrast in methane-rich atmospheres of various planets.
• Not for Visual Use: Due to human eye limitations beyond 700nm, this filter is solely for imaging purposes.
• Recommended for Large Apertures: Best results with larger aperture telescopes, requiring longer exposure times.
• Safety Warnings:
  • Not suitable for solar imaging without an energy rejection filter.
  • Risk of damage to telescope and imaging system if used without proper precautions.
• Planetary Imaging Focus: Particularly effective for Mars, Jupiter, Saturn, and other planetary bodies.

The Antlia Filters CH4 - 1.25" Methane Filter is a must-have for astrophotographers focusing on planetary imaging, offering a unique opportunity to explore and capture the subtle details of planetary atmospheres that are otherwise invisible in standard visual spectrums.

Specifications

• Optical Substrate: High-quality material with 1.25” size (2mm ±0.05mm thickness).
• Surface Quality: Rated 60/40 as per MIL-O-13830 standards.
• Polishing: Both sides fine-optically polished to ensure 1/4 wavefront accuracy.
• Parallelism: Maintained at 30 arcsec for precision.
• Center-Wavelength: Specifically at 889nm for Antlia CH4 filter.
• High Transmission: Over 90% (Tave＞90%) at 889nm.
• Blocking Capacity: OD5 (0.001%) effectiveness from 200-1050nm.
• Coating: Multi-layer anti-reflection treatment on both sides.
• Substrate Integrity: Single, non-glued design for durability.

Filter Ring Features:

• Size: 1.25” (M28.5*0.6) format.
• Design: Ultra-thin cell to reduce vignetting and maximize clear aperture.
• Finish: Durable black anodized coating.
• Engraving: Permanent laser marking, resistant to fading.