Re: need learning aids for astrophoto
Hi Dick, you asked for "learning aids" so here are a couple of recent books I would recommend:
1. The Astrophotography Manual by Chris Woodhouse - https://www.amazon.com/Astrophotography-Manual-Practical-Scientific-Approach/dp/1138055360/ref=tmm_pap_swatch_0?_encoding=UTF8&qid=1588684414&sr=8-5
2. The Deep Sky Imaging Primer, Second Edition by Charles Bracken - https://www.amazon.com/Deep-sky-Imaging-Primer-Second/dp/0999470906/ref=sr_1_7?crid=LW7SLOLA05HO&dchild=1&keywords=astrophotography+books&qid=1588684493&sprefix=astrophotography%2Caps%2C201&sr=8-7
Both are great book and either [or both] will get you a good start on the modern cameras, mounts, software and techniques.
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/