Photographic lens, camera body, and camera system

Details Photographic lens, camera body, and camera system Photographic lens, camera body, and camera system

1997-01-15

1998-03-10

Perkey, W. B.

Photography

Battery insertion/removal/depletion responsive

Having indicator

396303, G03B 726

Patent

active

057272417

ABSTRACT:
A camera system regulates electric power from a power supply within a camera body to a plurality of built-in actuators within a removable photographic lens. The actuators may include motors, solenoids, and the like which operate functions such as autofocus and image blur suppression. The photographic lens is equipped with a memory which stores data relating to the power supply characteristics of the built-in actuators. A transmission unit within the photographic lens transmits the stored data to a receiving unit within the camera body. A power supply characteristics measurement unit within the camera body measures data relating to power supply characteristics of the electric power supply while a determination unit determines whether to supply electric power from the electric power supply to the actuators in response to all of the data. A display unit on the camera body displays a warning when no electric power is supplied to the actuator.

REFERENCES:
patent: 5113210 (1992-05-01), Kashiyama et al.
patent: 5557365 (1996-09-01), Ohsawa

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