Celor lens
Encyclopedia
A Celor lens is a highly corrected lens
Photographic lens
A camera lens is an optical lens or assembly of lenses used in conjunction with a camera body and mechanism to make images of objects either on photographic film or on other media capable of storing an image chemically or electronically.While in principle a simple convex lens will suffice, in...

 of the Dialyt type, designed for process photography, involving reproduction at or near 1:1 scale.
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