Single lens reflex camera with interchangeable lens
AssigneeCarl-Zeiss-Stiftung
InventorsWaldemar Rentschler, Franz Starp
Life of this patent
Estimating the term…
Abstract
A photographic camera of the single lens reflex type, having provision for interchangeable lenses. Whenever a lens is not fully and properly engaged with and seated on the camera, the image on the focusing screen is blurred or altered from the normal image in a way to attract the attention of the photographer, so that he can make immediate correction before losing the opportunity to take the picture he wants.
Claims12
A single lens reflex camera of the type having a mirror movable to and from a normal reflecting position in which the mirror reflects an image of a scene onto a viewfinder screen and having an interchangeable lens detachable from the camera and attachable thereto in a definite functional operative position, characterized by the provision of means for blurring said image on said screen if an interchangeable lens is not attached in said definite operative position.
Dependencies are inferred from the claim text.