Binoculars
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| Choosing Your Binoculars |
| Take into consideration the type of use intended for the binoculars and read the following definitions to assist you in choosing the right binoculars. |
| Magnification
Level: The first number in a binocular description. It is the number of times an object appears to be closer than a normal view. For example an 8x42 binocular would have a magnification of 8 times, so when looking at an object 800 feet away, it will appear 100 feet away through the binoculars. |
| Objective
Lens: The second number in a binocular description is the diameter of the objective lens measured in millimeters . The light gathering ability increases with the size of the objective lens as does the image brightness. An 8x42 binocular would have a brighter image than an 8x32. |
| Exit
Pupil: The column of light that comes through the binocular to your eye. The larger the exit pupil number, the brighter the image will be under low-light conditions. To find the exit pupil, divide the objective lens number by the magnification number. For example an 8x32 binocular would have an exit pupil of 4. |
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| Field
of View: A measure of how broad the viewing angle is in either degrees or or the width at a given distance. Generally, wider is better for viewing sports or wildlife. |
| Eye
Relief: Binoculars with long eye relief allow eyeglass users to see the complete field of view. |