This program will generate a card that you can print out and use to judge the distance to objects. Simply edit the information and click the card preview to download your full sized card.
Originally based on How to make a Rangefinder for MINOX by Martin Tai.
Note: This will generate a pdf which
should be printed at 100% magnification. The final card should be
3.5" wide by 2" tall. These are the
dimensions of a standard business card. You will have to print it
from an application that lets you set the size of the image you
To Use: Hold the card in your hand at arm's length. With your left eye, line up the '0' marking with a vertical element of the object you wish to measure the distance to. Now look through your right eye. The distance measurement that lines up while looking through your right eye is the one you want.