Here's a lens with a very long focal length
150MM DIAMETER F/17 PCX LENS 2600MM FL - Surplus Shed
Even longer.
http://www.surplusshed.com/pages/item/l3919d.html
150MM DIAMETER F/17 PCX LENS 2600MM FL - Surplus Shed
Even longer.
http://www.surplusshed.com/pages/item/l3919d.html
Last edited: