FACTOID # 72: There are 22 countries where more than half the population is illiterate. Fifteen of them are in Africa.
 
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Encyclopedia > Rangefinder

A rangefinder is an optical device that allows distance to be estimated or measured using triangulation, laser, radar, or other method.


See also: Rangefinder camera


  Results from FactBites:
 
Camera Anatomy - Rangefinder Cameras (896 words)
Rangefinder cameras fall into two separate sub catagories, those in which the rangefinder is coupled to the focussing mechanism of the camera (coupled rangefinder cameras) and those in which the rangefinder is used to determine the distance only - which is then transferred to the lens manually, clearly a less convenient, but cheaper, option.
In use, the photographer peers through the rangefinder to observe a main image onto which is superimposed a secondary image (often tinted yellow covering a small circular part in the centre of the main image).
The alternative is to have a central composition window and two independent rangefinder windows, this is a compromise in it's own right as the photographer now has to focus through the rangefinder and compose through the viewfinder.
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