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The specially-designed Lunt Solar Systems 50mm Compact Double-Stack Filter is made specifically for their LS50THa H-alpha Solar Telescope. The filter lowers the bandpass of the LS50THa to <0.5 Angstroms for enhanced surface detail. This easy-to-install double-stack filter threads directly onto the LS50THa and for user safety cannot be used without a blocking filter.
In the Box
Lunt Solar Systems 50mm Compact Double-Stack Filter for LS50THa Solar Telescope