How to focus binoculars properly 

Find out how to adjust your binoculars for the sharpest, best quality images.
Transcript:
There are two ways of focussing your binoculars:
First, the central focus wheel. When you turn this, it focusses both barrels of your binoculars. Turn the wheel all the way in one direction, then point the binoculars at something you want to look at, then turn the wheel back until the image sharp
Then there's the diopter focus wheel. Now this focusses the right barrel of the binoculars so you can adjust for any differences between your eyes.
If you're wearing glasses that already correct these differences, you don't need to make an adjustment, you just leave the diopter in its central position.
If you do need to use the diopter, close your right eye and get the image focussed for your left eye. Then close your left eye and use the diopter to make the same image just as sharp for your right eye.
You only need to do this once, unless you're sharing binoculars of course.
Binoculars featured in this video:
RSPB Avocet® binoculars 8 x 42: shopping.rspb.... £140