Set the interpupillary distance by grasping the body and bending it until you can see one circle of view.The setting for your eyes will be indicated on the IPD Scale.(note the scale setting for later use.) Focusing: 1.Close your right eye and sight an object with your left eye focus the binocular by rotating the center focus wheel until the image is sharp and clear. 2.Open your right eye and close your left eye.Rotate the right eyepiece until the object sight is sharp and clear.(note the setting of the diopter scale for later use.) 3.Both sides (eyes)are now in focus and you will need to use only the center focus wheel to focus on the other objects.