Autofocus distance-measuring optical system

An electronic distance meter comprising:

• a sighting telescope having an objective lens;
• an optical distance meter including a reflection member;
• an AF sensor unit which detects a focus state of said sighting telescope;
• and
• a controller for driving the objective lens of said sighting telescope to focus said sighting telescope on a sighting object in accordance with said focus state detected by said focus detecting device,
• wherein said AF sensor unit comprises a phase-difference detection type AF sensor unit which detects an in-focus state from a pair of images respectively formed by two light bundles which are respectively passed through two different pupil areas of said phase-difference detection type AF sensor and passed through different portions of said objective lens of said sighting telescope;
• and
• wherein optical elements of said optical distance meter are positioned such that the two light bundles which pass through two different pupil areas pass around said reflection member without being incident on the reflection member.

An electronic distance meter comprising:

• a sighting telescope including an objective lens and an eyepiece;
• an optical distance meter including a reflection member;
• a phase-difference detection type of AF sensor unit which detects an in-focus position from a pair of images respectively formed by two light bundles which are respectively passed through two different pupil areas of said phase-difference detection type of AF sensor unit and passed through different portions of said objective lens;
• a focus adjustment lens positioned between said objective lens and said eyepiece to extend a focal length of said objective lens;
• and
• a controller for driving said focus adjustment lens to focus said sighting telescope on a sighting object in accordance with said in-focus position detected by said focus detecting device;
• wherein optical elements of said optical distance meter are positioned such that the two light bundles which are passed through two different pupil areas pass around the reflection member.