How to use a primitive rangefinder?
Let’s find out!
How to Use a Primitive Rangefinder?
A primitive rangefinder works by measuring the angle between two objects using a simple protractor. The simplest way to measure this is to place one object against another so they touch at 90 degrees (or 180 degrees if you prefer).
Then move the second object away from the first one until it touches again. This will give you the angle between them.
Coincidence Rangefinder
Optical ranging devices were used in the 1940s to measure distances. They were used in fire control systems and were also used in range finder cameras. Stereoscopic telemeters looked very similar but had two eyepieces instead of one. These devices were used in rangefinder cameras.
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Design
A telescope uses two prisms to make sure that the light travels straight. When the prisms are rotated in opposite directions, the light gets displaced horizontally. This makes the image appear to move left or right.
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Applications
Optical rangefinders were first developed for military uses but soon became popular for photography. Rangefinders were originally accessories, but eventually became integrated into cameras.
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Usage
A coincidence rangefinder uses a pair of eyepieces to view a target. When the target is aligned with both eyepieces, the distance to the target is measured using a range scale.
A coincidence rangefinder was used by the Dutch navy. A coincidence telemeter was used by the Polish destroyer ORP Wycher.
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How to Use a Primitive Rangefinder?
Conclusion
This article tells you about primitive and coincidence rangefinders. If you have any questions comment down below.
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Author
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John is the Editor in Chief here at The Outdoor Stores. His area of expertise ensures that there is no one better to suggest which rifles are most suitable for your hunting experience. He is also available for you to contact him personally to discuss the types of animals you want to hunt and the terrain you will be hunting on. Feel free to read his posts for expert opinion on Rifles, Scopes, Rangefinders, Bonoculars and Monoculars.