File talk:Cassegrain telescope2.png

This image shows a concave secondary mirror, which isn't the case in cassegrains.. 82.130.50.86 20:15, 17 August 2007 (UTC)
 * Yes, that's right. I've tweaked the image a bit. --Duk 08:15, 6 September 2007 (UTC)

What software is used to make this?--98.98.220.166 (talk) 00:24, 13 February 2009 (UTC)