LS60FHa Front Mount Double Stack Filter

The Lunt LS60FHa is a 60mm hydrogen-alpha front-mount double stack etalon filter designed for solar observation and imaging on customer-supplied refractor telescopes. With no central obstruction, it delivers high-contrast views of solar surface details and prominences with an estimated bandpass of <0.70 Angstrom; when double-stacked with another etalon, the bandpass reduces to approximately <0.50 Angstrom for higher resolution observation and imaging. Compatible with Lunt 60mm dedicated solar telescopes and featuring tiltable tuning capability, this filter can retrofit most refractors with appropriate adapters and supports focal lengths up to 540mm (with B600 blocking filter) or longer with optional larger blocking filters. A Lunt blocking filter is required for safe and proper operation.