Kodak Aero-Ektar 305mm, f2.5.
Once owned by Burk & James Inc., Chicago, Ill.
I’m trying to find any (and all) information about this lens.
I know it is for an aerial surveillance camera, but know little else.
I’m planing on using this lens as the prime piece of glass on an ultra large format camera.
There is another picture of this lens HERE.