Archived posting to the Leica Users Group, 2005/06/30
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]>http://www.gmto.org/tech_overview >best,simon jessurun Isn't that about 25m across (3 x 8.4m) and a focal length of 18m which results in approx. f/0.7? f/1 and larger (smaller number) are usual apertures in large mirror telescopes. -- * Henning J. Wulff /|\ Wulff Photography & Design /###\ mailto:henningw@archiphoto.com |[ ]| http://www.archiphoto.com