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I’ve been plugging away at the new Observatory and setup for 5 months now, and it’s finally coming together.

Changes to the imaging gear since last season:

  • Borg reducer now 0.7x from 0.85x. Now at F4.4
  • Moved from guidescope to OAG (Telescope Service, QHY5)
  • Baader RGB/NB sold, moved to one 5nm 36mm unmounted Astrodon Ha
  • EQ6 RA worm & ring gear upgraded to one from Aeroquest Machining (
  • EQ6 RA belt drive mod

I still have a few issues to sort out, the OAG is too far in and causing a shadow on my images, top right on this picture. Also I lost about 15% of the outside of this after stacking due to a plate solve problem. I have a little chip on the corner of the OAG which (I think) is causing this weird effect on the guide stars, although they still guide not bad and they focus fine using a mask

I’m quite chuffed with this image considering the conditions last night. There was loads of high cloud (shown by the bumpy red line between the two spikes here) that was lit up by the full moon. I had a test image from a few nights ago that was much darker and had better contrast. I’ve no doubt the Astrodon helped here

Camera: Atik 383L+ Mono with Astrodon 5nm Ha
Scope: Borg 101EDII with 0.7x Reducer @ F4.4
Mount: EQ6 with EQMOD
Guiding: OAG with QHY5
Capture Software: CCD Commander, Maxim DL
Processing Software: Deep Sky Stacker, PixInsight
Exposures: 8 x 15 mins
Calibration: 50 x Bias, 25 x Darks, no flats

Click on the image for the super duper big version…


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