Nikon Small World - The Nikon International Small World Competition first began in 1974 as a means to recognize and applaud the efforts of those involved with photography through the light microscope. Since then, Small World has become a leading showcase for photomicrographers from the widest array of scientific disciplines.

Stephen Gandy's CameraQuest - Site devoted to buy/sell/trade/repair, mostly for classic cameras. There's an extensive list of on-site classic camera profiles with tons of information on the topic.