Clock Drive, the SAC8 is bigger than the lens, the lens is from my EOS its a 28mm-80mm zoom.
(http://www.jumpers4goalposts.org.uk/images/Astronomy/Wide%20Field/mount.jpg)
Image, 20x20sec stack, darks subtracted, LPR filter.
(http://www.jumpers4goalposts.org.uk/images/Astronomy/Wide%20Field/near-cassiopia%20copy.jpg)
[ This Message was edited by: csuddell on 2004-11-30 22:59 ]
Nice image Chris. If you want to work out the image scale (how much sky you captured) of your len, then pay a visit to the Webb society http://www.webbsociety.freeserve.co.uk/notes/Plate_Scale.html