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Publication of FR837275ApublicationCriticalpatent/FR837275A/fr
G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
G02B23/14—Viewfinders
Landscapes
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Astronomy & Astrophysics
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General Physics & Mathematics
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Optics & Photonics
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FR837275D1938-04-291938-04-29Système de mise au point pour appareil photographique
ExpiredFR837275A
(fr)