Easy Guide For Collimating Your Binoculars

• A binoculars is a pair of refracting telescopes.
• The alignment between these two telescopes is called collimation.
• Collimation can be easily disturbed.
• Collimation can be adjusted easily.
• How?
• A few of the steps defined below and a screw driver.

Pre-Steps:

• Check the collimation in daylight.
• Focus on a far off building.
• After focusing, determine which objective shows image up and which shows it down.
• Determine what side needs collimation and the image needs to be moved where and how much.

An image of a house from a miscollimated binoculars

• When you are done, you are ready to collimate.

Collimating the Binoculars:

• Find the porro prism set screws.
• Mount the bino on a tripod or a bino mount, or put it on some high stool so you can look through the binoculars as you adjust the screws.
• It also helps to turn the right eyepiece diopter adjustment all the way to one extreme, to make it fuzzy for one eye, while you look at a star. This helps by preventing the eyes from compensating for any small difference in collimation

Collimation Screws Location

• Working of screws is very simple.
• Screws move the image.
• Move the right screw clockwise and the image moves downward and to the left.
• Move it counter-clockwise and it goes up and right.
• Similar is the case with left screw.
• Move the left screw clockwise moves the image to the down and right side.
• Moving it in counter-clockwise moves it up and to the left.
• Test it frequently as you drive the screws as to avoid major mis collimation.
• That should do it. Its never a difficult task to collimate a binoculars.