What are the graduated crosshairs in binoculars for?

Feb 16 2008

joshyjerry asked:

The graduations are in twenties. How do you use that?

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Eagleflyeron 18 Feb 2008 at 3:14 pm 1

I would think that these are more suitable for rifle scopes, not binoculars. Especially since there are crosshairs, like where the bullet is supposed to hit.

These graduations are an aid for estimating distances.

The dots are spaced in 1 mil increments on the crosshairs. By using a mil formula, a table can be generated based upon the size of the object being range-estimated. The object viewed is bracketed between the dots, and by consulting the table the distance can be estimated.
John Boyon 21 Feb 2008 at 1:19 pm 2

They are for estimating range, but you have to have to know what the graduation increments are for it work properly. But basically if they are supposed to indicate something 10′ tall, and your looking at an object that is 10 feet tall… then you would line up the lines (one at the top and one at the bottom) and when the object fits between those line the corresponding number is the distance to it… give or take a little.

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