Optivisor® binocular head lens. Adjustable and magnifying glass capacity of 2.5x, 2.75x and 3x.
Bergeon® binocular head lens. Adjustable and magnifying glass capacity of 3.5x.
Peak® binocular head lens. This product had lens with Velcro fix and two magnifying capacity of 2.5x and 3.3x.