Donegan DA-5 OptiVisor Headband Magnifier, 2.5x Magnification, 8" Focal Length

Binocular headband magnifier provides hands-free magnification and viewing for a variety of applications such as jewelry-making, watch-making, needlework, artwork, electronic inspection, book-reading, print inspection, and stamp-collecting Available in multiple dioptric strengths (indicated by the model number) that provide a specific magnification power (X), depending on the distance from the object A dioptric number and a magnification number are not the same thing. Diopter strength represents a specific magnification power (X). For example, a 5-diopter provides 2.5X magnification (at a distance of 8”) Optical glass lenses are ground and polished into prismatic lenses for quality and clarity Can be worn over prescription or safety eyeglasses