Monday, 23 July 2012

Triple Stacked Full disk 22nd July

TS Full disk bw by Mark Townley
TS Full disk bw, a photo by Mark Townley on Flickr.

Taken with a pair of SM40 externally mounted etalons and a PST etalon mounted internally in the focuser. Lots more detail visible at these narrower bandwidths - looks quite different to double stacked!