Magnifying Tools – Donegan LX-5 OptiVISOR Headband Magnifier, 2.25X Magnification Optical-Grade Acrylic Lens Plate, 8″ Focal Length

Donegan LX-5 OptiVISOR Headband Magnifier, 2.25X Magnification Optical-Grade Acrylic Lens Plate, 8″ Focal Length

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Here is the Donegan LX-5 OptiVISOR Headband Magnifier, 2.25X Magnification Optical-Grade Acrylic Lens Plate, 8″ Focal Length Description:

The Donegan OptiVISOR LX is a hands-free, headband binocular magnifier that has an optical-grade, acrylic lens plate that is ground and polished into prismatic lenses for quality, clarity, and durability, and is available in multiple dioptric strengths (indicated in the model number) which provide specific magnification power (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, needlework, artwork, electronic inspection, book-reading, print inspection, and stamp-collecting.

The OptiVISOR LX magnifier features a durable, replaceable binocular lensplate, made of optical grade acrylic (model AL-13). An adjustable headband with padded leather comfort band conforms to a variety of head sizes and provides comfort for hours of continuous use. It can be worn over prescription or safety eyeglasses. A durable, plastic visor tips up above the forehead when not in use. Spring-loaded pivot screws hold the headband in a raised or a forward-facing position. The magnifier weighs 0.67 lbs., and comes housed in a protective shell and 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”). 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) decrease. 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 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

 

Determining Magnification

Diopter
Magnification
Focal length
(Distance from object)
Sample view
20/20 vision
20″ (50.8cm)
No Magnification
2-diopter lens
1.50X
20″ (50.8cm)
1.50x Magnification
3-diopter lens
1.75X
14″ (35.56cm)
1.75x Magnification
4-diopter lens
2.00X
10″ (25.4cm)
2.0x Magnification
5-diopter lens
2.50X
8″ (20.32cm)
2.50x Magnification
7-diopter lens
2.75X
6″ (15.24cm)
2.75x Magnification
10-diopter lens
3.50X
4″ (10.16cm)
3.50x Magnification

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?

  • OptiVISOR LX magnifier
  • Fitted, plastic carrying case
  • Instruction manual

Then if you need to be aware of Donegan LX-5 OptiVISOR Headband Magnifier, 2.25X Magnification Optical-Grade Acrylic Lens Plate, 8″ Focal Length selling price, feature as well as product critiques coming from consumer, you can click on THIS LINK . I really hope that publish may help you to help end up buying Donegan LX-5 OptiVISOR Headband Magnifier, 2.25X Magnification Optical-Grade Acrylic Lens Plate, 8″ Focal Length merchandise, or maybe this kind of write-up will let you to locate different item which is or even superior to Donegan LX-5 OptiVISOR Headband Magnifier, 2.25X Magnification Optical-Grade Acrylic Lens Plate, 8″ Focal Length or perhaps identical.

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