How To Focus Binoculars How to Calibrate & Focus Binoculars Focussing vs Calibration Most people will know how to focus binoculars using the central focussing wheel which focusses both barrels on the binocular simultaneously. But this is only part of the story because unless you have also properly calibrated your binoculars for your vision, you may never actually get a completely sharp image (when looking through your optics with both eyes open). This is something that really stuck me when I was working as a safari guide. I observed many people using their binoculars whilst on safari, but who did not know how to correctly calibrate them for their particular vision. I know this, because I would ask and they just said that they used them as they were when they first took them out of the box. To me it seemed such a shame to spend good money on a quality pair of optics and then not be able to enjoy them properly with the best view possible because they are incorrectly set up to suit your particular vision, especially as calibration them is easy to do. I am sure there are probably even some people who eventually stop using their binoculars all together, or who return them to the manufacturer, incorrectly assuming that there is a problem with their device because of the blurry and out of focus image it produces for them. Correctly calibrating and focussing binoculars to allow for any differences in strength between your left