- Step 1: Adjust barrels Hold the binoculars in the normal viewing position. Move the two barrels closer together or further apart until a single circular field comes into view.
- TIP: Roll the eye cups back if you wear eyeglasses.
- Step 2: Set diopter setting Set the diopter setting to zero wile viewing a distant object. Keep both eyes open.
- Step 3: Cover first objective lens Cover the objective lens on the same side of the binocular setting as the diopter setting.
- TIP: The diopter setting is usually on the right side.
- Step 4: Focus Focus on a distant object by adjusting the center focus wheel until the object appears as sharp as possible.
- Step 5: Cover second objective lens Uncover the objective lens on the diopter side, and cover the other objective lens. Observe the same object.
- Step 6: Focus Bring the object into focus by adjusting the diopter setting.
- Step 7: Focus at any distance Uncover the second objective lens. The binoculars are now adjusted for your eyes, and you can focus for any distance by simply adjusting the center focus wheel.
- FACT: The first binoculars appeared shortly after the invention of the telescope and were made by fastening the long tubes of two telescopes together.
You Will Need
- Diopter setting
- Lens cover
- Distant object
- Eye cups (optional)