Getting into birdwatching requires the ability to be able to use a pair of binoculars properly. Using a pair of binoculars is more than just putting them to your eyes and looking around. If you are new to this equipment, you will need to learn how to use the focus wheel and dioptre. The dioptre is also used to focus, but is there to compensate for the difference between your left and right eyes because they will not focus to the same degree. You need to be able to use both of these focuses in the right way in order to get the clearest image from your bird watching binoculars.
To get started with focusing your bird watching binoculars, you should first make sure that they are in right position for the width of your eyes. If they are too far apart or too close together you will have black edges infringing into what you see. When you look through the eye pieces, you should just see a perfect circle. Having got this right, look through them at something and use the central focus wheel to bring the image into focus.
Use the dioptre wheel to focus more finely on the object you’re looking at. To do this, you need to close each eye in turn and adjust the wheel until the image is clear. When you open both eyes again, the image should be perfectly clear through your binoculars. If not, continue to adjust slightly until it is.