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

Elimination of parallax parallax is a condition

This preview shows page 4 - 5 out of 5 pages.

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
Image of page 4
Image of page 5

You've reached the end of your free preview.

Want to read all 5 pages?

  • Winter '17
  • salman ahmed

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask ( soon) You can ask (will expire )
Answers in as fast as 15 minutes
A+ icon
Ask Expert Tutors