Pseudo format camera system

• US 5,142,310 A
• Filed: 07/25/1990
• Issued: 08/25/1992
• Est. Priority Date: 05/17/1988
• Status: Expired due to Fees

• Current Assignee: Minolta Camera Kabushiki Kaisha
• Original Assignee: Minolta Camera Kabushiki Kaisha
• Inventors: Sumitani, Atsushi, Inoue, Manabu, Taniguchi, Nobuyuki, Yamaki, Toshio, Seki, Reiji, Ishimura, Toshihiko
• Primary Examiner(s): Perkey, W. B.
• Assistant Examiner(s): SPYROU, CASSANDRA
• Application Number:
  US07/560,220
• Time in Patent Office: 762 Days
• Field of Search: 354/412, 354/105, 354/106, 354/275, 354/21
• US Class Current: 396/60
• CPC Class Codes: G03B 7/0807 Control circuits G03B7/10 takes precedence
• CPC Class Codes: G03B 7/097 for control of both exposure time and aperture
• CPC Class Codes: G03B 7/24 automatically in accordance with markings or other means indicating film speed or kind of film on the magazine to be inserted in the camera

Abstract

A pseudo format camera system comprises a film cartridge including a memory which stores film speed data and limitation data, and a camera including a means for setting pseudo focal length, a means for inputting the film speed data and the limitation data from the memory, a means for controlling exposure based on the film speed data, and a means for limiting the pseudo focal length depending on the limitation data. In this camera system, the pseudo focal length can be limited based on the limitation data stored in the memory in the film cartridge, and therefore it is surely prevented that a picture becomes rough because of a bad grainness of a film.

Claims

1. A pseudo format camera, comprising:

means for producing limitation data representative of a settable pseudo focal length range of a film loaded in the camera, said limitation data being different from a film speed data representative of a film speed of a film loaded in said camera;

means for setting a pseudo focal length; and

means for limiting a range of the pseudo focal length settable by said setting means in accordance with the limitation data produced by said producing means.