Hello all, greetings from Finland!
This is my first image post to CN. During the summer break I acquired the Celestron RASA scope and since I haven’t seen too many pictures taken with this scope I figured I’d share. The setup that I use is the RASA fitted with a QSI690wsg camera riding on a 10Micron GM1000HPS mount. This combination gives me the image scale of 1.23”/px and a FWHM median of around 2.8” (15-second L exposure measured with PixInsight). I think that is scope-limited due to the short 620mm focal length. The 5-position QSI camera doesn’t quite fit inside the central obstruction so I use a small rectangular aperture mask over the camera to get cleaner diffraction spikes instead of covering much more aperture with a round mask. Also the wires from the camera are routed over the aperture using a 3D-printed round channel.
My jury is still out on using the RASA unguided, I have been getting a bit mixed results. The best models I have been able to obtain are a bit under 20” RMS (mirror locked during modeling), but the models have not been very comprehensive so far since our RoR is still under construction. If I’m not able to get consistent results unguided the backup option is to use a ASI120MM in the QSI’s OAG port that will then eliminate all mirror issues.
But on to the images!
NGC 7000, LRGB 1h 40min, 5-minute unguided subexposures
Thanks for looking, comments are welcome.
Edited by vehnae, 11 October 2015 - 04:04 AM.