Quote:
Originally Posted by strongmanmike
Another nice galaxy image Dennis, always nice to look at.
I notice that many of your framings don't have the galaxy in the centre of the frame, is this because of the difficulty finding a guide star with the self guide feature..?
Keep posting I love seeing different galaxies even if only in b&w.
Mike
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Hi Mike
Thanks for the nice words of encouragement!
I’d like to think it is the artistic side in me, following the proportions of the Golden Mean to create the perfectly balanced composition but alas, you’ve hit the nail on the head, it’s the size of the TC211 guide chip, a paltry 192x164 pixels that tends to dictate where the target will appear on the main chip.
I did get to use Gerald’s SBIG ST4000XCM on the last evening at the Qld Astrofest and I was absolutely spoiled with the ST237-sized 640x480 guide chip!
I have tried my hand at off-axis guiding but at focal lengths of over 1500mm, I haven’t been too successful yet, with maybe 1/3 of the frames showing signs of slight elongation, so I would need to do some more analysis and work to chase this down.
In the meantime, I quite happy poodling along with the ST7 and learning how to process mono data before I join you big boys in the rarefied, stratospheric realms of megapixel LRGB imaging, with it’s plethora of challenges to overcome; the sheer expense being one major hurdle right now.
Cheers
Dennis