Donegan V400 Double Coddington Magnifier With Lens, 15X, 20X Magnification, 15Mm And 10Mm Focal Length

Magnifiers Are Devices Used To Enlarge The Visual Appearance Of An Object Or Image. Magnifiers Come In A Variety Of Styles Such As Hand-Held, Headband, Standing, Clip-On, Eye Loupe, And Those That Hang In A Necklace Form, Or Fit In A Trouser Pocket. Magnifiers Are Commonly Made Of Plastic Or Glass. They Can Have One Or More Lenses With Varying Magnification Abilities, And Can Have A Binocular Configuration With A Single Lens, Or Two Separate Lenses. They Are Sometimes Used With Led Or Fluorescent Light Sources To Help Control Viewing Capabilities. Magnifier Ability Is Often Expressed As Magnification At A Specific Length. For Example, 1.75X At 14 Means That When A Magnifier Is Held At 14 From A Viewers Eyes, The Object Will Be Magnified 1.75 Times (X) Its Actual Size. As Magnification Increases, Viewing Areas And Focal Length Decrease. Magnifiers Sometimes Have A Diopter Number, Expressed As + Or -D, Which Is A Measurement Of Strength (Or Power) Of The Lens. Some Magnifiers Are Marked With A Dioptric Number On The Lens. A High Diopter Number Has A Higher Magnification Than A Low Diopter Number. Aspheric Magnifiers, Unlike Spheric Magnifiers, Produce A Sharp Image To The Edge Of The Lens For Less Distortion. Magnifiers Are Widely Used In Jewelry Inspection And Fabrication, Watch-Making, Needlework, Artwork, Fly-Tying, Electrical Inspection, Reading, Print Inspection, And Stamp-Collecting.Donegan Optical Manufactures Precision Visual Devices Such As Magnifiers And Optical Loupes. The Company, Founded In 1952, Is Headquartered In Lenexa, Ks.