Customers ask - experts answer

It is often the little hints and tips that make everyday life easier. Our experts offer you advice on your optics.

Exit pupil diameter and light transmittance

When daylight comes in through a window, the brightness in the room depends on two factors: the size of the window and the cleanliness or opacity of the glass. The same principles apply when we talk about the brightness of a pair of binoculars. ZEISS expert Walter Schwab, trainer at the academy, used this analogy to answer a nature lover's question.


Care of the Optics



Diopter Adjustment

Have you ever given thought to the fact that your eyes probably don’t have the same ability to see? Our ZEISS binoculars enable you to mechanically adjust this difference of left and right eye, which means the binoculars function as a diopter compensator. Read more instructions here: