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Old 07-12-2018, 02:23 PM
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MLParkinson (Murray)
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First nebula images with a Borg 200 mm f/3.8 astrograph

Here are my first attempts at imaging with my ‘new’ Borg 200 mm f/3.8 astrograph, the same model RickS started using recently. I say ‘new’ because I acquired the Borg back in autumn 2017, and have only just recently had a go at processing the first two data sets. It took quiet a lot of experimentation interchanging the various tubes until I found a backspacing near to the sweet spot for flat images with circular stars in the corners. The image quality seems pretty damn good to me. I think the Borg is a winner.

https://flic.kr/p/2c1UGNc

https://flic.kr/p/RgK4fs
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Old 07-12-2018, 02:42 PM
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LewisM
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I take it you mean the Borg 55, with the 200mm focal length, not a 200mm aperture Borg?
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Old 07-12-2018, 03:09 PM
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Looks good to the corners, Murray! I still need to do a little tweaking of the spacing on mine. What camera did you use? Was it the QSI listed in your sig?

Cheers,
Rick.
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Old 07-12-2018, 04:13 PM
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MLParkinson (Murray)
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Yes Lewis, the Borg with the tiny little 55 mm objective. I doubt I could afford to buy a lens with a 200 mm objective lens, though using one sounds like a beautiful idea.
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Old 07-12-2018, 04:15 PM
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MLParkinson (Murray)
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Quote:
Originally Posted by RickS View Post
Looks good to the corners, Murray! I still need to do a little tweaking of the spacing on mine. What camera did you use? Was it the QSI listed in your sig?

Cheers,
Rick.
Yes Rick, the QSI683wsg. It's stilling going strong. One of the best toys I ever acquired.
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Old 07-12-2018, 04:21 PM
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Rick, I just looked at your Borg Orion & Horsehead composition under astrobin, and the corners look excellent.
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Old 07-12-2018, 04:31 PM
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Rick, I just looked at your Borg Orion & Horsehead composition under astrobin, and the corners look excellent.
A little cropping improved it, Murray
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Old 08-12-2018, 06:48 AM
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multiweb (Marc)
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Really nice fov. Much fun ahead.
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Old 09-12-2018, 03:22 PM
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A couple of big bold widefield images there Murray - as Marc said above - you're going to have fun with that rig!
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