Antlia Solar Discover 5Å H-alpha 656.28 nm 1.25" is a specialized solar filter designed for use in H-alpha observation systems based on etalon technology. With a central wavelength of 656.28 nm and a bandwidth of 0.5 nm (5 Å), it enables detailed observation of solar chromosphere structures when used within a proper optical system. The hard-coated design and integrated blocking filter set ensure effective suppression of out-of-band radiation.

Key features

• H-alpha filter with central wavelength of 656.28 nm
• bandwidth: 0.5 nm (5 Å)
• hard-coated construction for durability and stability
• integrated UV and IR blocking filter set
• coating range: approx. 600–720 nm
• designed for use in etalon-based systems (e.g. Lunt DS modules)
• compatible with planetary cameras for imaging and visual observation

Box contents

• Antlia Solar Discover 5Å H-alpha 1.25" filter

Technical specifications

• manufacturer: Antlia
• model: Solar Discover 5Å H-alpha
• size: 1.25"
• central wavelength: 656.28 nm
• bandwidth: 0.5 nm (5 Å)
• clear aperture: 12 mm (B1200)
• coating range: 600–720 nm
• coating type: hard-coated
• blocking: integrated UV/IR blocking filter

Important: this filter is not a standalone solar filter and must not be used independently for solar observation or imaging. It must be used together with an etalon-based system and additional optical filtering. Improper use may result in damage to eyesight or equipment.