Patent
1974-04-08
1976-02-24
Horan, John M.
G03B 100
Patent
active
039407756
ABSTRACT:
A method of composing pictures of objects comprises the steps of exposing a frame of a record medium such as a frame of a roll of film or a target in a television camera via a camera lens while masking a portion of the field from exposure by a first mask disposed in front of the lens. The field frame of the record medium is then re-exposed via the same lens, while masking a previously unmasked portion of the field or frame and maintaining the f/stop for the lens the same as for the first exposure. The foregoing is accomplished by apparatus in one instance comprising a camera having means for transporting film, a lens, first and second masks serving to block light to complimentary portions of the film, a light shade supported by the lens to sequentially support the masks in front of the lens at a distance sufficient to inhibit exposure of complementary portions of the film. In another embodiment of the apparatus, a support holder having a plurality of masks is detachably securable to a light shade in front of the lens. The support holder is designed to selectively position each of its masks individually in front of the lens as desired.
REFERENCES:
patent: 1103745 (1914-07-01), Farquhar
patent: 1510410 (1924-09-01), Menyhart
patent: 2866397 (1958-12-01), Gillette
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