Here FINALLY is the latest instructional video on Photoshop by Adam Block. This video, part of the larger "Cosmic Canvas" series, completely replaces all previous versions and brings everything up-to-date with new techniques and better explanations for processing astrophotographs. With over 13 hours of material, both beginners and seasoned astrophotographers will benefit from the information.
Several of Adam's signature techniques including Shadow/Highlights for LRGB, the Screen technique for blending H-alpha data, and the Multiply contrast enhancement all make an appearance. In addition topics such as alpha channels and batch processing make an appearance for the first time. This tutorial is rounded out with two example processing sections (Techniques, sections 10 &11) which include the base data for you to follow along with.