NGC 457 Owl Cluster

Conditions were a bit better than on February 10 - seeing and transparency both listed as average, and winds were very light - but colder. Despite acquiring 8 useable images to pump up the S/N ratio, the camera is too noisy at ISO 1600 for quality work. But as the mount was unguided, high ISO allowed me to reduce tracking errors.

My back yard, February 11, 2010, 6:30-7 PM; T=-12 C, sky clear but seeing average with very light winds. 120mm ED at f/7.5, with unmodified Canon XSi; Hutech LPS filter; unguided. 8x1 min, @ISO 1600.