A couple of big ones

[mdarnton]

http://www.shorpy.com/node/22418
Click on the photo for an enlarged view.
I calculate the one on the bottom to be about 40", f/10 or so.

[David Lobato]

Pretty ingenious. The rotating trunnion seems to move like an equatorial mount for the two massive cameras. And the bench vice and single floor leg look like the only supports for the whole assembly.

[stawastawa]

really cool, I wonder if the image(s) they made are available.

I was hoping it would be here: http://mlso.hao.ucar.edu/hao-eclipse-archive.php#y1869