Orion Spring 2017 Page 2 How to Choose a Binocular

2 ORION How to Choose a Binocular Before we look at specific binocular models, let's take a few moments to go over common attributes of binoculars. By learning a few simple terms, we'll prepare ourselves to make good choices when selecting a pair of binoculars. 7x50, 8x42, 20x80 - What Do All These Numbers Mean? Different types of binoculars are described by a pair of numbers with an "x" in between: 7x50, 8x42, 20x80, etc. The first number is the binocular magnification (or power). The second number is the aperture (or diameter) of the objective (front) lenses, measured in millimeters. For example, a 7x50 binocular provides 7-times magnification and has objective lenses that are 50mm in diameter. Magnication Don't be fooled into thinking that a higher magnification (or power) will always give you a better view. The higher the power, the "shakier" the view will be, because small hand movements get magnified. Unless you have a specific need for high magnification, we recommend a binocular of moderate 7x or 8x magnification. Objective Lenses For a given magnification, larger objective lenses will yield a brighter image in dim light. However, binoculars with large objective lenses will generally be heavier and bulkier than binoculars with smaller objective lenses. Binocular Original Size 7X 8X 10X Objective Lens Diameter

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