For all of the years I’ve been doing astrophotography, I hadn’t done much narrowband imaging.
I recently got an Askar 50 mm, f/4 lens, 200 mm focal length, astro lens and thought I’d use it to try some narrowband imaging.
Here’s a 2h, 20min exposure of NGC7000 at ISO 800 using an Astromania 12 nm Hydrogen Alpha filter installed in the ACL200, with a full spectrum modified Nikon D5100 attached.
The lens & camera were mounted to my RC8, mounted on my CGEM.
Software control via BYN, PHD2, and ASCOM.
Post processing was done in PS Elements 11.
Resolution greatly reduced here from the original. Also, slightly cropped.
I’m liking this Askar lens.
Edited by KLWalsh, 22 October 2021 - 05:07 PM.