FAQ Group: Binoculars (page 3)

To calculate the exit pupil diameter, divide the diameter of the objective lens by the magnification of the binocular. For example, a 10×32 binocular has an exit pupil of 3.2 millimeters. All binoculars with the same magnification and objective lens…

The exit pupil is a bright circle that can be seen in the center of each eyepiece when you hold binoculars about 30cm (arm’s length) from your eyes with the objective lenses pointed toward a bright light. The diameter of…

The diopter knob allows you to balance any vision differences between your left eye and right eye. The first time you use any binocular, always make sure to properly adjust the diopter knob. There may be a mark for the…

Eye cups typically twist up or fold down. If you don’t wear glasses, the eyecups should be twisted up to their fully extended position. If you do wear glasses, keep them folded down. This is critical. It will keep your…

The objective is the lens system farthest from where you put your eye, where the incoming light from the viewed object first enters.

The eyepiece is the lens system closest to where you put your eye.

The bridge of binocular is the space between the two barrels. Some binoculars have an open hinge bridge design, and some have a closed bridge design, which is basically a larger, single-piece hinge. Open hinge systems use two smaller parts…

Yes, you can view the moon with 10x or 12x binoculars, the larger the objective the better. Typically, we would recommend one of our 12×50 binoculars, which you can mount onto a tripod with a binocular tripod adapter.

The higher the power, the harder it is to quickly find and follow movement. Higher power binoculars make spotting and following birds more difficult.

Typically, 8x is ideal for bird watching.