ETA: "Wide-Open" is in reference to American tax-payer orifices.
Well, it doesn't look to me like it would be soft.
The Navy would have used it for aerial surveillance most likely - no focusing required, it would have always been shot at infinity. It would have been mounted to a fixed position aimed out a window. Probably also used for night-time surveillance. And compared to the optics used to photograph high resolution terrestrial images from space, that lens would probably have been cheap.
Cheap for a branch of government that I watched push perfectly good helicopters into the ocean to save deck space. The military probably taught budgeting to the NSA.
I know darned well the US govt paid W-A-Y too much for such a specialty item... they always do.
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