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Hello everyone! After a pretty dreary September and part of October, I was finally able to get out with students to do some viewing. Here are some of the objects viewed over two nights using Starlight Live software on my Borg 77edii (f/4) and Borg 125SD (f/5) with a Trius 694 mono camera. In most cases an IDAS NB-1 "nebula" filter was employed to help with the suburban light pollution in our skies. The first night (mainly 125SD) was much steadier and drier, but along the coast we take what we can get when it isn't raining! ;-D It's so much fun to see these objects from less-than-optimal skies... I often intend to quit much earlier, only to find myself saying (over and over!) "... oh, look, <object> is coming up... I should just have a look at that before I pack up." And then another hour goes by! Cheers, - Greg A Eastern & Western Veil Comparison of FOV between two scopes on the NA Nebula Again, FOV comparison on the Elephant Trunk Nebula And again, with the Rosette Nebula Pacman Nebula through the 125SD: And Crab Nebula: And the Cocoon Nebula: Finally, a few wider shots of objects using the Borg77: Flame/Horsehead, California Nebula, Pelican Nebula and Andromeda Galaxy:
Hello everyone, I was able to get out again recently and run a few sessions with students. The images below are labelled, and are from our less-than-perfect suburban site on campus using both a Celestron CPC 800 (8" SCT) at f6 and various Borg refractors (in this case, primarily a 77mm Borg EDii) at f4 with a SX Trius 694 monochrome CCD camera. All shot with an alt-az mount using SLL software for capture/stacking. No post processing other than the usual on-the-fly adjustments. I'm using the Trius 694 in 2x2 bin mode, mainly because SLL doesn't seem to want to work with it using any other binning mode. Luckily, it seems to work fine in 2x2 and I'm generally happy with the results, though I find with the fork mounted CPC that the need to use a diagonal makes spacing of the reducer/camera tricky, and I'm not getting as well corrected or reduced a field as I'd like (I'm using an Antares 0.5x reducer, but I'm only getting f6 out of it and still see artifacts at the edges). Any suggestions are welcome! Cheers, Greg A