Talk:Stanhope lens

magnification of 4096 may be obtained
citation needed - excessive precision --195.137.93.171 (talk) 01:08, 24 February 2011 (UTC)

Flickr
This is what I bumped into at Flickr for "no known copyright restrictions". Something here may be useful. --Doug Coldwell (talk) 13:41, 20 July 2016 (UTC)