Interpupillary distance in binoculars is also known as the interpupillary distance! The interpupillary distance refers to the optimum distance between the eyepiece lens and the pupil of the eye. With riflescopes, it is a question of trying out what is most comfortable for you. Most binoculars, as well as all DDoptics models, have so-called retractable eyecups, which can be used to set the optimum interpupillary distance. Eye relief [...]
