This Old US Army Camera Had a 100-Inch Infrared Lens and Required a Spotter
Check out this beastly camera used by Signal Corps during the Cold War. It featured a 100-inch infrared lens that was capable of seeing through over twenty miles of hazy air — perfect for capturing reconnaissance photographs of enemy strongholds. The camera was so massive that it required two people to operate: one to frame the shot, and one to snap the photo.
100-inches is 2540mm and the camera appears to use 4×5 large format film, so the equivalent 35mm focal length of this cannon-like lens is roughly 760mm.
[
petapixel.com]
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