LS100FHa — 100mm Front-Mount H-Alpha Solar Filter A 0.45Å tilt-tuned etalon for two purposes: double-stack upgrade for existing Lunt 100mm systems, or standalone H-alpha filter for customer-supplied refractors. Now with new-generation etalons — every unit individually tested on Lunt's precision metrology equipment. Every specification is verified, not estimated. The LS100FHa is a 100mm aperture front-mounted tilt-tuned H-alpha filter with a Root 3 non-centralized obstruction design and a verified bandpass of 0.45Å. It serves two distinct purposes — as a double-stack etalon for existing Lunt 100mm solar systems, or as a standalone H-alpha solar filter for a customer-supplied refractor. As a double-stack filter: The LS100FHa places its 0.45Å tilt-tuned etalon in series with an existing Lunt 100mm etalon system, reducing combined system bandpass to
