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Birding BinocularsPart 5
Field of ViewThe field of view is how wide an area is encompassed in the binoculars' image. It can be expressed as an angle (8°), or as the width in feet of the image at 1000 yards (420 ft.) To convert the angular field to the linear field, multiply the angular field by 52.5. Field of view is a matter of eyepiece design. More power usually means a narrower field of view. Wide-field-of-view eyepieces usually have shorter eye relief and may not work for eyeglass wearers. Though it is important, field of view is usually not the first concern in choosing birding binoculars.
—Michael and Diane Porter
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