High quality diffraction limited IR Cut Energy-Rejection-Filters for h-alpha solar filters.

Unmounted filters only. Adapter plates we maschine on request to customers need, please ask for a quote.

Specifications:
• Material: RG630
• Diameter: 185mm
• Aperture: 180mm
• Thickness: 5mm
• Side 1: Dielectric IR Blocking Coating
• Side 2: Broadband AR coating
• Wavefront: <1/4 wave T