[A self-focussing daylight projection box and transparency preselector for the Leitz Pradovit-oftal].
D055095:Optics and Photonics; D009907:Optometry / Q000295:instrumentation; D014787:Vision Tests / Q000295:instrumentation*
Autofocus, Tageslicht-Projektionsbox und dia-Vorwahl zum leitz-Pradovit-oftal.