Binoculars LabZZ B4 8x21

Describes the internal structure of a pair of binoculars, thereby further subdividing the different types.

A compact and modern binoculars design, in which the objective lens and the eyepiece lie in a straight line.

The second specification in the binoculars’ model number is the front lens diameter. The larger it is, the more light the binoculars collect.

The eye relief specifies the maximum distance from the eyepiece at which the entire field of view can still be seen. A suitable distance for spectacles wearers is >16mm.

Binoculars are focused by focusing on the object, or rather the eyes of the observer.

The sharpness is adjusted via a central focusing wheel.

The binoculars’ magnification may be variably adjusted using either a lever or a scroll-wheel.

Compensates for the natural trembling of the hands. The picture is so stable, as if you were observing using a tripod.

An automatic or manual feature for measuring distances.

Watertight optics are equipped with special seals and are gas-purged. This is usually with nitrogen or argon gas. Since these gases are heavier than air, they cannot escape.

A 1/4" thread for connection to a photographic tripod. Most binoculars require an additional tripod adapter.

The angular field of view visible with the binoculars.