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What is an individual eyepiece focus binocular (IF)?

April 26, 2017binocular eyepiece focus individual

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What is an individual eyepiece focus binocular (IF)?

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A26. An individual eyepiece focus binocular requires you to focus each eyepiece individually when viewing an object, but once the focus is locked- in, objects from 40 yards away to infinity are always in focus and require no additional focusing. This is a great system for viewing objects at medium and long range distances, but it is obviously not suited for viewing objects at close range in work. IFs are most commonly found in marine binoculars and astronomy binoculars.