BINOCULAR PARTS
•
Using one pair as a reference, show the parts of a binocular to the group:
•
Explain the purpose of each part (it may also be helpful to use the included
Brunton Optics Brochure)
•
Ocular Lens
– the lens closest to one’s eyes through which an image is
viewed
•
Focus Wheel
– the center dial one uses to focus the binocular (moves
the lenses inside the binocular)
•
Diopter
Adjustment
– moveable ring that allows custom focusing for
each eye (to accommodate vision differences between one’s eyes)
•
Objective lens
– the lens closest to the objects you are viewing
•
Demonstrate the focus wheel and the diopter adjustment. Help each person
adjust the binocular for a clear, focused image.
•
Explain that binoculars come in different configurations, shapes, and sizes to
accommodate different needs and preferences. Also mention that there are
many features to consider when purchasing binoculars. Refer to the
Optics
brochure for more information.
BINOCULAR CARE
•
Ask students if they have any suggestions regarding binocular care.
•
Elicit responses, and guide students toward these important points:
•
Keep the lenses clean, and never touch them with your fingers.
Focus Wheel
Ocular Lens
Objective Lens
Diopter
Adjustment
