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PostPosted: Sun Oct 06, 2013 1:59 pm 
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Joined: Fri Dec 28, 2007 3:05 pm
Posts: 1133
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Kemble's Cascade at a funny angle by cybermystic, on Flickr

Test shot taken last night - clear, Moonless, bliss :D :D
20 subs at 5-minutes per sub.
Canon 200mm prime lens and the M25C OSC.
Light patch near centre left edge is possibly a light-leak. Covered the joints with Aluminium foil so we'll soon see.
Funny angle as I just shot at wherever I dumped the lens in the holder - should now be more oriented NSEW
Focusing much tougher using Maxim DL than it was using the Canon 5D MkII's LiveView - which was a doddle.
Hugely more red sensitivity with the M25C (as expected).
Sampling around 8 arc seconds per pixel c/f 6.5 arc seconds per pixel with the 5D MkII.
Field of view 6.64 x 4.46 degrees with the M25C c/f 10.2 x 6.8 degrees with the 5D MkII.
It's all swings and roundabouts.
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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