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Method and apparatus for maintaining a consistent effective focal length in a digital camera

  • US 7,116,364 B2
  • Filed: 10/29/2002
  • Issued: 10/03/2006
  • Est. Priority Date: 10/29/2002
  • Status: Expired due to Fees
First Claim
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1. A method for maintaining a consistent effective focal length in a digital camera, the digital camera having a lens system, the lens system having a first focus mode and a second focus mode, the first focus mode having a first maximum focal length, the second focus mode having a second maximum focal length, the method comprising:

  • determining an effective focal length of the digital camera while the lens system is in the first focus mode; and

    applying sufficient digital zoom to maintain the effective focal length, when the effective focal length exceeds the second maximum focal length, the second maximum focal length is smaller than the first maximum focal length, and the lens system is switched from the first focus mode to the second focus mode.

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