I love using my CFF 290 Classical Cassegrain. Here is an image taken (at f/8.1, 2350mm) of the brighter half of the Crescent Nebula in Cygnus. This is a full narrowband image. I took three hours of H-alpha then spent a night on what I thought was O3 but which turned out to be S2---ouch (slip of the brain when controlling the filter wheel)! The S2 is blended in here. I finally caught another 3 hours of O3. Total time: 8 hours 50 minutes. The H-a and S2 subs were 20 minutes long; the O3's were 30 minutes each.
After I finished the O3 subs and the Crescent slipped behind the trees, I put a diagonal and eyepiece in the big scope and enjoyed a tour of Cygnus. Highlights included the Owl Nebula and Phi And (0.5" clean split; truly awesome to see those little diffraction patterns so close together). As always, the scope performed like a champ. I started observing at 3:30 a.m. and made myself put it away at 5. I had to sleep sometime.
