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Lunt ERF 50 mm energy-rejection-filter. Diameter 53 mm, aperture 50 mm, thickness 3.5 mm.
LUNT LS50ERF 50mm Energy-Rejection-Filter
High quality diffraction limited IR Cut Energy-Rejection-Filter with 50mm aperture.
For experienced self builders of solar telescopes, Lunt Solar Systems offer unmounted Energy Rejection Filter (ERF) of 40mm up to 100mm aperture as accessory. These ERF are suitable for use together with additional H-alpha Etalon filters.
• Material: RG630
• Diameter: 53mm
• Aperture: 50mm
• Thickness: 3.5mm
• Side 1: Dielectric IR Blocking Coating
• Side 2: Broadband AR coating
• Wavefront: <1/4 wave T
Delivered by order:
• 1 x LUNT 50mm ERF
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