Prototype dated 1968/1969 fixed focus and aperture going to /4 to /16, it was producing a 180° FoV in a 20mm circle.
Topcon RE Fish EYE Auto Topcor 7mm f/4.0
Prototype, fixed focus, 1968 c.ca
a comprehensive fisheye lenses knowledge base
Prototype, fixed focus, 1968 c.ca
Prototype dated 1968/1969 fixed focus and aperture going to /4 to /16, it was producing a 180° FoV in a 20mm circle.
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