Differential viewfinder masks
AssigneeEastman Kodak Company
InventorsRandy Eugene Horning, Ralph Merwin Lyon
Life of this patent
Estimating the term…
Abstract
A camera comprising a viewfinder for defining a field of view provided with a given aspect ratio, and a pair of front and rear masks insertable in the field of view to position respective larger and smaller openings of the front and rear masks in the field of view to change the aspect ratio of the field of view, is characterized in that a differential gear mechanism connects the front and rear masks for moving the front mask a greater extent than the rear mask is moved, to position the larger and smaller openings in the field of view.
Claims6
A camera comprising viewfinder means for defining a field of view provided with a given aspect ratio for viewing a subject to be photographed, and a pair of front and rear masks insertable in the field of view to position respective larger and smaller openings of said front and rear masks in the field of view to change the aspect ratio of the field of view from the given aspect ratio to a selected aspect ratio also for viewing the subject, is characterized further in that:
- differential gear means connects said front and rear masks for moving the front mask a greater extent than the rear mask is moved to position the larger and smaller openings in the field of view.
A camera comprising viewfinder means defining a field of view provided with a given aspect ratio for viewing a subject to be photographed, and a pair of front and rear aspect-ratio-changing masks for changing the aspect ratio of the field of view from the given aspect ratio to a selected aspect ratio also for viewing the subject, is further characterized in that:
- said front and rear masks have at least two pairs of matching front and rear openings to provide a least four opening, each of said pairs of matching front and rear openings being separately alignable in the field of view to change the aspect ratio of the field of view to a different ratio;
- and
- drive means for moving said front and rear masks a first increment in opposite directions to align one of said pairs of matching front and rear openings in the field of view and a second increment in the same directions to align another of the pairs of matching front and rear openings in the field of view.
Dependencies are inferred from the claim text.