Close Focus

Techno-Stabi 14x40 TS-X 1440 Image-Stabilized Binoculars Black

Close focus is the distance away you can bring something into sharp focus. This will determine how useful your optics are while viewing different things at different distances. In general, a shorter distance is preferable and makes the optic more versatile to use for multiple purposes. Full descriptive text along with how this will effect your view can be found in the Basics III article in the All About Optics section.