I like astrophotography because it is challenging. A good picture is only partly determined by the quality of optics and mount, the transparency and turbulence of the atmosphere and the darkness of the night sky. A large role is played by how the equipment is actually used: how collimated the optics, how good the polar…
Hot Pixels, Star Alignment and Interpolation
A few months ago, while testing out ways to reduce the effects of light pollution on pictures taken from my downtown “observatory”, I took a few subframes of the Leo Triplet (M 65, M 66 and NGC 3628) with a Baader Planetarium UHC-S filter. As the intent was just to get a first impression of…