Summer Triangle with H alpha enhancement-Labled
I love the summer triangle region defined by the three bright stars overhead - Deneb, Altair and Vega. This is a combination of two sessions, one with and one without a 12nm H alpha filter. It is my best effort in capturing this amazingly rich region of the sky.
2012-08-03 at the Victoria Centre Observatory.
Conditions - clear and warm (24 deg C) with no wind and a rising nearly full moon dreating the glow in the lower right.
Equipment - Sigma 15mm F/2.8 lens on a Hutec modified Canon T3i camera with an Astrotrac mount.
Exposure - 14 - 60s color frames at ISO 100 and f/2.8. 8 -60s Ha frames at ISO 3200 and f/2.8.
Processing - Alignment, stacking and stretching in Images Plus with additonal enhancement in Photoshop. Ha and color were combined using lightening blend layer in Photoshop.