Lunt LS40FHa (Old Etalon) Front Mount 40mm Double Stack Solar Filter (LS40FHa)

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This uses the old etalon design and will sell until out of stock. New options available on the site. LS40FHa Double Stack Solar Filter The Lunt LS40FHa Solar Filter is a 40 mm aper ture (no central obstruction) integrally tuned etalon for use on Lunt Dedicated 40 mm Telescopes The Lunt LS40FHa Double Stack Unit is intended for use with the Lunt 40mm Dedicated Hydrogen Alpha System and requires a Lunt Solar Systems Blocking Filter (this is a safety requirement). Because the LS40FHa Solar Filter has an estimated bandpass of Show more