Endeavor ED II

The new Endeavor ED II series features a number of upgrades, chief among them being the incorporation of premium extra-low-dispersion glass into the optical formula, for enhanced correction of chromatic aberration. The goals were to achieve greater overall sharpness and brilliance in the viewing image, reduce color fringing, and minimize falloff in sharpness and detail at the edges of the field.

The body is clad in a leather-textured, rubber-like material that provides comfort and a secure grip. The underlying magnesium-alloy chassis provides exceptional strength.

The new optics are nitrogen purged, with nitrogen replacing air between the optical elements to prevent fogging and mold formation.

One clever feature carried over from the previous models is the locking eyepiece adjustment system. To adjust the binoculars for your eyesight and compensate for any variation between your eyes, close your right eye, look through the left-hand eyepiece with your left eye, and turn the central focusing wheel to focus sharply on a distant object. Now close your left eye and, as you look through the right-hand eyepiece with your right eye, push the right eyepiece diopter control ring forward to adjust position, turn the textured collar toward the right or left until the image of the object is critically sharp, and then pull the collar back to lock your setting. There’s a graduated scale below the control, too, that lets you reset it to your spec if another user changes the setting.