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Viewing apparatus having a photographic function

  • US 20030086164A1
  • Filed: 09/27/2002
  • Published: 05/08/2003
  • Est. Priority Date: 09/28/2001
  • Status: Active Grant
First Claim
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1. A viewing apparatus with a photographing function comprising a viewing optical system and a photographing optical system;

  • wherein said viewing optical system comprises a positive objective optical system and an eyepiece optical system, in this order from an object;

    wherein an image of an object, formed by said positive objective optical system, is viewed though said eyepiece optical system;

    wherein said photographing optical system is provided independently from said viewing optical system, and said photographing optical system covers substantially the same field of view as that of said viewing optical system;

    wherein said viewing apparatus satisfies the following condition;

    0.1<

    ft/fo
    <

    0.7 wherein ft designates the focal length of said photographing optical system of said viewing apparatus, and fo designates the focal length of said objective optical system of said viewing optical system.

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