ELIMINATION OF PARALLAX Parallax is a condition arising when the image formed

Elimination of parallax parallax is a condition

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ELIMINATION OF PARALLAX: Parallax is a condition arising when the image formed by the object is not in the plane of the cross hairs. Unless parallax is eliminated, accurate sighting is not possible. Parallax can be eliminated in two steps. Focusing the eye-piece Focusing the object glass Focusing the eye-piece: Point the telescope to the sky or hold a piece of white paper in front of the telescope. Move the eyepiece in and out until a distant and sharp black image of the cross-hairs is seen. Focusing Eye Piece FOCUSING THE OBJECT: Telescope is now turned towards object to be sighted and the focusing screw is turned until image appears clear and sharp. . Comments: After the completion of this job we are fully aware with digital theodolite and can measured horizontal, vertical angle and also measured distance without measuring tape with accuracy. Which is very helpful in practical life. BSCE01183138 CIVIL ENGINEERING DEPARTMENT SECTION-D
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ADVANCE ENGG.SURVEY EXPERIMENT-2 BSCE01183138 CIVIL ENGINEERING DEPARTMENT SECTION-D
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  • Winter '17
  • salman ahmed

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