Scientific Lens Co. Kosmos Wide Angle Lens for 8x10 Cameras
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This is a wide angle anastigmat lens for an 8x10 camera.
While it is not marked on the lens, we estimate the focal length of this lens to be roughly 8.5" (about 216mm) at infinity. This makes it roughly equivalent to a 32mm lens on a 35mm camera.
The aperture is selected by turning an external wheel - whole stops are possible from ƒ16 to ƒ256.
Please note that there is no shutter included with this lens; exposures are made by manually uncovering and covering the lens for the appropriate time interval.
The glass is clean and clear. There are signs of use, but overall the lens is in great condition for its age. The mounting flange is included with this lens.