What is Stretching?

If you haven’t visited my blog over at Sky & Telescope, now’s a great time to sample them. My latest post is about stretching data, and it builds on the last few posts which delve into linear and non-linear data, and what all this stuff about “bit-depth” is about. Typically when I write or speak, I don’t like to delve into clever processing tricks, but I like to cover the fundamentals. Getting good data, proper calibration and understanding the nature of what you have. If you have this foundation down, processing the images and getting “pretty pictures” is 100x easier!

Astro-Imaging: Stretching the Truth