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Accessory and motor drive device for camera, and camera system

  • US 6,118,949 A
  • Filed: 09/08/1998
  • Issued: 09/12/2000
  • Est. Priority Date: 09/11/1997
  • Status: Expired due to Term
First Claim
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1. An accessory capable of being connected with a camera body, said accessory comprising:

  • a) a communication line for communicating information on an operation mode of said accessory from said camera body to said accessory; and

    b) a determination switch for determining type of a battery connected to said accessory, wherein said determination switch is connected in series with said communication line and is arranged to be closed when a specific type of battery is connected to said accessory.

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