O.K. so unfortunately I didn't have a full set of frames in the Markarian Chain region to create the mosaic I thought I had - but here's a B&W version of a three-frame Hyperstar III mosaic with M87 nearest the centre. Data acquired April 2010 each frame approximately 3-hours total using 5-minute sub-exposures at f#2.
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/