User manual ORION TELESCOPES & BINOCULARS BINOS

[. . . ] For more details, read on. Roll-Down Eyecups Most Orion binoculars feature roll-down eyecups. The eyecups are usually left in the up position for use without eyeglasses. To use the binocular with eyeglasses, simply roll down the eyeguard by folding down one side, then slide your fingers across to the opposite side of the eyepiece. Cleaning and Care of Binoculars The lens surfaces of Orion binoculars are coated with anti-reflection coatings that can be damaged with careless handling. [. . . ] The more fresh, clean lens tissue you use, the less likely you are to scratch your lenses. Always avoid excessive pressure or rubbing. It is better to leave a tiny amount of dirt on the lens than to use too much pressure and destroy the coatings. Eyecups in the "eye-up" position Eyecups in the "eye-down" position Adjusting the Distance Between Your Eyes Hold each barrel firmly and move the two barrels together to match the distance between your eyes. You should see a single round field with both eyes. Make this adjustment before you focus. Focusing The small center wheel between the two barrels is for focusing the binoculars. The center wheel focuses both barrels simultaneously. Turn the wheel until the image is clearest. The left eyepiece does not rotate; the right one does. The rotating right eyepiece is called the diopter adjustment. Diopter Adjustment Because all eyes are slightly different, Orion binoculars feature a "Right Eye Diopter Adjustment. " The purpose of this is to compensate for slight differences between a person's two eyes. With both eyes open, cover the right objective lens (front) with your hand. Turn the center-focusing wheel until the image in the left side is sharp. Again, cover the left objective lens (front) with your hand and focus the right side by rotating the right eyepiece until the image is sharp. The binocular is now adjusted to your eyes. Make a note of the diopter adjustment and turn the right eyepiece to that diopter adjustment whenever you look through them. Once you make this adjustment, you do not have to touch the diopter adjustment. Simply focus both sides by turning the center wheel. Storage and Cold Weather All optics, when exposed to excessive temperature changes or high humidity, have the potential to fog up. Always allow the optics to slowly adjust to cold weather by storing the instrument (in its case) in a cold area such as an unheated garage or the trunk of a car for a few hours before use. When bringing the instrument back inside a warm house, store it in a cool area for one to two hours. [. . . ] Binocular collimation (alignment of the two barrels) is specifically not covered beyond the 30-day return period. Binoculars go out of collimation only if they are dropped or bumped. Binocular collimation (and cleaning) are considered routine maintenance and should be done every five years, or when necessary. [. . . ]