Donegan Optivisor DA-10 Headband Magnifier Visor with 3.5x and 4 Inch Focal Length
DA-10 Donegan OptiVISOR is a hands-free, headband binocular magnifier that has 3.5x optical glass lenses that are ground and polished into prismatic lenses for quality and clarity, and provides a focal length working distance of 4" other lenses are availa
DA-4 Donegan OptiVISOR is a hands-free, headband binocular magnifier that has 3.5x optical glass lenses that are ground and polished into prismatic lenses for quality and clarity, and provides a focal length working distance of 4 other lenses are available in varied magnification which provide specific magnification power (X) at specific focal lengths, or distance from object. The Donegan OptiVISOR is considered by many to be the finest headband magnifier available and has been proudly made in the USA for many decades and is highly durable and widely used in industrial and commercial applications.
Optivisor Optical Glass Binocular Magnifier - 7 Diopter 2.75X
Optical polished glass lens Universal fit (head size adjuster) Comfortable and soft head band Can be warn over spectacles Leaves both hands free,
Optivisor DA-4 2X Head Band Handsfree Magnifier Visor
Donegan DA-10 Optivisor Headband Magnifier, 3.5X Magnification, 4 Focal Length
Head Wearing Magnifier, Optical Lens Glasses, Magnifying Visor, Headband with 4 Lenses, Jewelry Tool, Repair, Reading, Welding - AliExpress
Head Wearing Magnifier, Optical Lens Glasses, Magnifying Visor, Headband with 4 Lenses, Jewelry Tool, Repair, Reading, Welding - AliExpress
Donegan DA-10 OptiVisor Headband Magnifier 3.5x Magnification 4 Focal Length 885115188580
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