Lunt blocking filter for H-alpha sun observation B600 - 1.25″ angled return

Lunt B600 blocking filter: Solar observation in H-alpha light

Le filtre bloquant Lunt B600, intégré dans un renvoi coudé au format 1,25”, est un composant indispensable pour l’observation du Soleil en lumière H-alpha. Conçu pour garantir une sécurité totale et une qualité d’image exceptionnelle, ce filtre est optimisé pour isoler la raie spectrale de l’Hydrogène Alpha (656,28 nm). Il permet de révéler les détails fascinants de la chromosphère solaire, tels que les protubérances, les filaments, et la granulation chromosphérique. Grâce à son diamètre de 6 mm, il offre un champ visuel élargi, idéal pour l’observation visuelle et l’imagerie solaire avec des télescopes à focale modérée.

What is the purpose of a blocking filter?

A blocking filter is an essential part of any H-alpha solar system. While the Fabry-Perot standard isolates a narrow band around the H-alpha line, the blocking filter acts as a "spectral cleaner". It eliminates stray wavelengths and unwanted harmonics, ensuring that only light centered on 656.28 nm reaches the eyepiece or camera.

Le modèle B600, avec son diamètre de 6 mm, est spécifiquement conçu pour des télescopes ayant une focale allant jusqu’à 540 mm. Il offre un excellent compromis entre observation visuelle et astrophotographie légère.

Key features

• Blocking filter diameter : 6 mm (B600), optimized for focal lengths up to 540 mm.
• Integrated angled return : 1.25" format, compatible with a wide range of standard eyepieces.
• Maximum safety : Complies with international standards for safe solar observation.
• Spectral optimization : Eliminates unwanted harmonics to isolate exclusively the H-alpha line (656.28 nm).
• Robust construction: Machined aluminum case with high-precision optical components.
• Increased versatility : Ideal for combining visual observation and imaging with small to medium-sized sensors.

Why choose the Lunt B600 blocking filter?

• Optimized visual observation : The B600 offers an enlarged field of view, perfect for comfortably observing the entire solar disk.
• Outstanding image quality : Thanks to its multi-layer system, it guarantees sharp, high-contrast images without light interference.
• Absolute safety : Effectively blocks harmful UV and IR radiation, ensuring safe use for your eyes.
• Practical versatility : Suitable for both visual observation and light astrophotography.
• Universal compatibility : Works with all Lunt solar telescopes equipped with a 1.25" angled return.

Recommended applications

• Visual observation of the Sun in H-alpha : Explore solar protuberances, filaments and granulation with optimal contrast.
• Light astrophotography : Compatible with cameras equipped with small to medium-sized sensors.
• Ideal for focal lengths up to 540 mm on compact or intermediate instruments.