Sport Optics

Structure and Optical Technologies

Focus adjustment

Focusing of CF binoculars

Movable internal lenses

Rotating the central focusing ring engages the internal shafts. Then, the tubes that fix internal lenses (concave lens) move so that the binoculars focus. Because objective lens and eyepiece lens are fixed, binoculars can have a highly airtight structure. This is recommended for CF (Central Focusing) waterproof binoculars.

Focusing of IF binoculars

Movable eyepiece lens unit

Rotating diopter adjustment rings that are located on both left and right eyepieces, moves the entire eyepiece lens unit in order to focus.

Sport Optics Guide -Binoculars-

Basic Information about Binoculars

How to Choose Binoculars

How to Use Binoculars

Structure and Optical Technologies

Sport Optics Guide -Fieldscopes-