Next, the diopter adjustment may well be a bit off, especially if you're holding the camera even a bit closer or farther from your eye than the baseline calibration is set for. BTW, for those who care :-), "diopter" is the inverse of the focal length of a lens. A lens of -3 diopters has a focal length of -3.33 meters.
3. Adjust the focusing ring in the center of the binoculars. The focusing ring is the wheel in the center of your binoculars, in between both barrels. Rotate the ring left and right until the image becomes clear in your left eye. [7] After you’re done focusing the left eyepiece, take your hand off the lens. 4. u6gcc.