Depth of field

The “depth of field” of a┬ábinocular refers to its ability to keep objects further towards the background and closer towards the foreground in focus without you having to adjust the focus. Stated in another way: Once you’ve focused on an object in the distance, how far behind this object (in other words, further away into the background) and how far in front of the object (in other words, closer to you, the viewer) is still in focus, without you having to adjust the focus. A special category of binoculars with super depth of field features is the so-called “auto focus” binoculars. They always stay in focus from 10 meter away to infinity.

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