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G02B13/00—Optical objectives specially designed for the purposes specified below
G02B13/04—Reversed telephoto objectives
G—PHYSICS
G02—OPTICS
G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
G02B23/14—Viewfinders
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Physics & Mathematics
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Optics & Photonics
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Astronomy & Astrophysics
(AREA)
FR676235D1929-06-051929-06-05Viseur à objectif grand angulaire pour appareils photographiques
ExpiredFR676235A
(fr)