Optivisor DA-4, 2.00X @ 10", Glass lens.
Optivisor DA-4, 2.00X @ 10", Glass lens.Optivisor DA-4, glass lens, 2X magnification, 10 inch focal length (working distance). Top-of-the-line headband magnifier. The original OptiVISOR features adjustable side pivots, an adjustable full headband with a leather and orthopedic felt-padded comfort band and precision-ground optical glass lenses for unsurpassed quality and durability.
The OptiVISOR and OptiVISOR LX are your best choice for the least eye and head fatigue, especially when used for extended periods.