Donegan ELS 2 Watch And Clock Makers Single Eye Loupe, 5x Magnification

The Donegan watch and clock maker’s single eye loupe is a magnifier that attaches to prescription glasses, can pivot away when not in use, has an optical glass, prismatic lens, and are available in a variety of magnification powers (X) at specified focal lengths, or distance from object. This magnifier enhances the size and resolution of an object or image, and is commonly used for a variety of applications such as jewelry-making, watch-making, clock-making, needlework, electronic inspection, book-reading, print inspection, and stamp-collecting.This magnifier features a single optical glass lens that is ground and polished into a prismatic lens for quality and clarity. It is made of a lightweight (2.6 oz.), durable material and is designed for comfort and utility. Changeable cams are included to fit eyeglass frames from 1/16” to 1/4” temple width. Eyeglass loupes clamp to eyeglass arms with ease, and are convertible from right to left temple mounting. The eyeglass loupe comes housed in a hard protective carrying case. It has a one-year limited warranty.Diopter (D) is a technical term for the measurement of the light curvature and thickness of a lens. 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”). Refer to the magnification chart for an illustration. The higher the diopter, the more magnification a lens can provide. As magnification increases, distance to the object (focal length), and field of view (diameter, or narrowness of view) decreases. Magnifiers and prescription eyeglasses have a diopter value, such as 1.5 or 2. The dioptric strength of an accessory lens, such as prescription eyeglasses or an eye loupe, must be added to the dioptric strength of the magnifier to calculate total magnification.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 viewer’s eyes, the object will be magnified 1.75 times (X) its actual size. As magnification increases, viewing areas and the 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, reading, print inspection, and stamp-collecting.Donegan Optical manufactures and distributes precision visual devices for hobbyists and professionals in industry, home, office and crafts applications. The company was founded in 1952 and is headquartered in Lenexa, Kansas.What’s in the Box?Single-eye loupe magnifierHard carrying caseInstruction manual

• Single-eye loupe magnifier provides hands-free magnification and viewing for a variety of applications such as jewelry-making, watch-making, clock-making, needlework, electronic inspection, book-reading, print inspection, and stamp-collecting
• Available in multiple lenses 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”)
• Lens attaches to prescription glasses, aligns in front of the eyeglass for magnification, and can pivot to the side when not in use
• Optical glass lenses are ground and polished into prismatic lenses for quality and clarity