Eyecups
Eyecups are used to cushion the face against the eyepieces as well as to help hold your eyes at the optimum distance from the eyepieces. Most eyecups have some provision for those wearing glasses, or those not- either using a twist-up mechanism or by simply folding the eyecups up or down. With eyecups in the down position, it’s possible to get too close to the eyepieces, which can cause the view to disappear (or “black-out”). If the eyes are too far from the eyepieces, you won’t see the entire FOV (field of view). The optimum position is where you can see the entire FOV and the view is not “blacking out”. A mid-position of the eyecup may be “just right”, but this varies with the individual. Those wearing glasses have two options- 1) take your glasses off and let the binocular’s focus range provide the correction you require or 2) leave your glasses on and put the eyecups in the fully-down position.
Eyepiece Cover
You’ll notice that the eyepiece cover has a loop on each side. No, the left side loop is not broken- it’s intentionally molded with a split. The purpose of the loops is so a neck-strap can be threaded through the right side, and simply hooked on the left side. When you raise the binocular to view, unhook the left side and allow the cover to drop away to the right side.
