Krevia Comet 8X40Mm Powerful Prism Binocular Telescope Outdoor With Pouch - Black Extra-wide field of view Classic design with comfortable grip Endurable metal prism housing & focusing mechanism Sharp & crispy image Technical Specification: Model: 8x40 Magnification: 8X Objective Lens: 40mm Focus System: Center Field of view 420ft @ 1000yds How to use Adjusting the eyecups, if you do not wear sun/eyeglasses, roll the eyecups up; otherwise, roll the eyecups down. Adjusting inter pupillary distance (IPD), IPD varies from person to person. Adjust the width of your binoculars so that each eyepiece is aligned with your eyes and that when you look through them, you see a single, perfectly round image free of shading. Focusing the binoculars, for center focusing binoculars, look through the left eyepiece with your right eye closed and turn the center focusing wheel to focus on an object. Then look through the right eyepiece with your left eye closed and turn the right diopter ring to focus sharply on the same object. Make note of the + or - diopter setting as this will remain constant unless your eyesight changes. Both sides (eyes) are now in focus and you will need to use only the center focus wheel to focus on the other objects. Pocket include: 1 X Binocular telescope 1 X Backpack 1 X Lens cleaning cloth 1 X User Manual