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 Post subject: 200mm with M25C
PostPosted: Fri Nov 15, 2013 1:27 pm 
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Joined: Fri Dec 28, 2007 3:05 pm
Posts: 1127
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Gamma Cassiopeiae region by cybermystic, on Flickr

Blazing Moon causing havoc last night so the Gamma Cassiopeia region was probably not the best idea. However, managed to fit the M25C to the back of the Canon 200mm prime lens and then even managed to focus AND collimate it as well. For a short time I even had the magic 0.0" collimation as well - WOWSER. Managed to do a test-run of 10 x 10-minute subs with the lens set at f#4.5. Considering the greatest light polluter in the sky was up there doing its best to wreck things I am very happy with the result. As a major bonus (for me) I even captured a Carbon star HIP 4284.
Greg

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Nexstar 11 GPS, 2 x Sky 90, M25C, MaximDL, Photshop CS3, Noel Carboni's Photoshop actions, 7 foot Pulsar fibreglass dome, Canon 40D, 100mm macro lens, 28-200mm zoom lens, 17-55mm f#2.8 zoom lens, 100-400mm zoom lens, 1.4x converter, 2x converter.
http://www.newforestobservatory.com/
http://www.flickr.com/photos/12801949@N02/


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 Post subject: Re: 200mm with M25C
PostPosted: Fri Nov 15, 2013 5:20 pm 
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Joined: Fri Dec 28, 2007 3:05 pm
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Gamma Cassiopeiae region by cybermystic, on Flickr

And here's a proper process courtesy of Noel Carboni.
Greg

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Nexstar 11 GPS, 2 x Sky 90, M25C, MaximDL, Photshop CS3, Noel Carboni's Photoshop actions, 7 foot Pulsar fibreglass dome, Canon 40D, 100mm macro lens, 28-200mm zoom lens, 17-55mm f#2.8 zoom lens, 100-400mm zoom lens, 1.4x converter, 2x converter.
http://www.newforestobservatory.com/
http://www.flickr.com/photos/12801949@N02/


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 Post subject: Re: 200mm with M25C
PostPosted: Sun Nov 17, 2013 3:42 pm 
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Joined: Fri Dec 28, 2007 3:05 pm
Posts: 1127
And here's a Noel Carboni reprocess which takes the best of the two above:

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Gamma Cassiopeiae region by cybermystic, on Flickr

Greg

_________________
Nexstar 11 GPS, 2 x Sky 90, M25C, MaximDL, Photshop CS3, Noel Carboni's Photoshop actions, 7 foot Pulsar fibreglass dome, Canon 40D, 100mm macro lens, 28-200mm zoom lens, 17-55mm f#2.8 zoom lens, 100-400mm zoom lens, 1.4x converter, 2x converter.
http://www.newforestobservatory.com/
http://www.flickr.com/photos/12801949@N02/


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