For a bit of fun I have been looking for an image of an aerial reconnaissance lens as a result of Tony Covells ' Information Please ' thread.
http://www.worldphotographyforum.com...ead.php?t=3640
I found this page which shows such a lens with a 50mm as comparison. I have no idea of the film format but I guess it would be fairly large.
http://photo.net/classic-cameras-forum/00Pr8i
I thought I would post it here as there are also two scans of early 1000mm lenses.
Two interesting things on the Takumar. Focussing appears to be similar to a Crayford focusser as used on an Astral Telescope, and check out that tripod collar.
Don