This comfortable binocular magnifier is perfect for bringing detailed work into focus. It fits comfortably on the head, and can be easily raised out
Optivisor w/Light Kit 2.5x at 8in
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Donegan OptiVISOR Binocular Headband Magnifier
OptiVisor LX-4 Binocular Magnifier - 2X at 10 inches —
Optivisor Forestry Suppliers, Inc.
Wholesale Glass Lens 1.5X 2X 2.5X 3.5X Optivisor Headband Magnifier Watch Repair Magnifying Glasses Magnifying Eye Lupa From Dejx, $44.14
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DONEGAN DA-5 OPTIVISOR® Binocular 2.5X Magnifier. Adjustable Headband Style $58.13 - PicClick
OptiVISOR Headband Magnifier
Donegan Optivisor optical glass lens plates are available separately and can be switched in moments. Simply press out the black keepers with a coin or something similar, switch lens and press the keepers back in. Earlier models had small nuts and bolts.Donegan is the only head mounted magnifier that is available with optical glass prismatic lenses. These lenses cost more but deliver the best clarity and longevity compared to the cheaper lens material used by other manufacturers.
3.5x Optivisor Lens Plate
OptiVISOR® DA - Precision Glass Binocular Magnifiers and Accessories
Replacement OptiVISOR Optical Glass Binocular Magnifiers – uptowntools