I'm glad I noticed this thread through Terry's post. Seeing Robert Vanderbei's work with the Questar got me interested in the potential of modern image processing with small scopes and into astrophotography. It was much too hard for me back in the film days. I'm an oddball in astronomy in that I like small portable equipment. The faster the setup, the more I use it. Although I'm no stranger to computer's, I like the analog feel of a vintage scope under the night sky and the challenge of creating a nice image from a small scope.
I've enjoyed seeing everyone's images here. Many nice ones from scopes even smaller than mine. I've been pushing hard learning modern image processing techniques on data mostly from a Questar 89mm and vintage camera lenses for about four years. I've been focused on using mirrorless cameras because of their small footprint, but I've recently been experimenting with a ZWO planetary camera. My software tools include: CaptureOne, Lynkeos, Nebulosity, PixInsight, AutoStakkert, and Photoshop all running on a Mac. Here are some examples with links to detailed information and full size images:
Omega Centauri with only a vintage Vivitar 135mm lens, Sony NEX-5n mirrorless camera, and Vixen Polarie tracker:
http://astronomy.rob..._byGallery.html
GhosttownOmegaCentauri160314.jpg
Comet Lovejoy, Sony NEX-5n and Questar 89mm
http://astronomy.rob..._byGallery.html
Saturn with five moons, Questar 89mm and Sony a6300 using UHD 4k 30fps video
http://astronomy.rob..._byGallery.html
Transit of Jupiter by Io, Questar 89mm and ZWO ASI120MC
http://astronomy.rob..._byGallery.html
This really captures what you see with a 90mm. Good work!
-drl