Here is an image of NGC 7293 that I took in Late August. It is a combination of Ha , straight luminance, and RGB exposures. I have attached a mid size image; full size image and exposure / processing details are at:
http://jthommes.com/Astro/Helix.htm
Scope is a C8 at f/6.2, Camera is an Artemis 285.
Exposure time was 81 minutes HA:L:R:G:B 30:24:9:9:9.
http://jthommes.com/Astro/Helix.htm
Scope is a C8 at f/6.2, Camera is an Artemis 285.
Exposure time was 81 minutes HA:L:R:G:B 30:24:9:9:9.
Attached Image:
Jim Thommes
Mak-Newt 152 mm
C8
Megrez II APO
Zenithstar 66 mm APO
G11/Gemini
ST8300M
Artemis285 Camera
Canon 350D DSLR
http://jthommes.com/Astro/