sun CaH 092308

This image was captured with a specialized solar filter that isolates a narrow (2 angstrom) band centered on the CaH wavelength (396.9nm) in the blue/violet.
Many thanks to fellow WNY astronomer Dennis Zywiczynski who gave me a chance to try this unusual filter, and to tiny sunspot group 1002 for arriving for the photo op.

September 23, 2008/ captured with Daystar Quantum CaH filter, A-P 155 edfs refractor with 90mm aperture mask, Baader FFC and DMK41AF02 camera

© Alan Friedman | all rights reserved