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Publication of FR318337ApublicationCriticalpatent/FR318337A/fr
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
G03B11/00—Filters or other obturators specially adapted for photographic purposes
G03B11/04—Hoods or caps for eliminating unwanted light from lenses, viewfinders or focusing aids
G03B11/046—Hoods or caps for eliminating unwanted light from lenses, viewfinders or focusing aids for viewfinders or eyepieces
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR318337A1902-02-031902-02-03Un roile à loupe pour la photographie
ExpiredFR318337A
(fr)