Our 4" Hydrogen Alpha Lunt telescope is a fantastic device for solar observing. Our specific model utilizes the internal double stacked module and the B1800 blocking filter which puts us right in the sweet spot for visual and photographic use. The bandpass of this telescope is <0.5 Angstroms, down from <0.7 Angstroms without the double stack, which allows for stunning views of the solar chromosphere.

Optical Aperture: 102 mm
Etalon: Internal <0.7 Angstrom
Etalon: DSII <0.5 Angstrom
Focal Length: 714 mm
F Ratio: F/7