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{"id":7086681063604,"title":"Donegan DA-2 OptiVISOR Headband Magnifier, 1.5X Magnification Glass Lens Plate, 20\" Focal Length 1.5x Magnification, 20\" Focal Length","handle":"donegan-da-2-optivisor-headband-magnifier-1-5x-magnification-glass-lens-plate-20-focal-length-1-5x-magnification-20-focal-length","description":"\u003ch3\u003eDonegan DA-2 OptiVISOR Headband Magnifier, 1.5X Magnification Glass Lens Plate, 20\" Focal Length\u003c\/h3\u003e\n\u003cp id=\"b\"\u003eThe Donegan OptiVISOR is a hands-free, headband binocular magnifier that has\noptical glass lenses that are ground and polished into prismatic lenses for\nquality and clarity, and is available in multiple dioptric strengths\n(indicated by the number in the model) which provide specific magnification\npower (X) at specific focal lengths, or distance from object. This magnifier\nenhances the size and resolution of an object or image, and is commonly used\nfor a variety of applications such as jewelry-making, watch- making,\nneedlework, artwork, electronic inspection, book-reading, print inspection,\nand stamp-collecting. The OptiVISOR magnifier features replaceable binocular\nlenses that have beveled edges that are mounted in an interchangeable plastic\nframe. An adjustable headband with padded leather comfort band conforms to a\nvariety of head sizes and provides comfort for hours of continuous use. It can\nbe worn over prescription or safety eyeglasses. A durable, plastic visor tips\nup above the forehead when not in use. Spring-loaded pivot screws hold the\nheadband in a raised or a forward-facing position. The magnifier weighs 0.67\nlbs., and comes housed in a protective shell and carrying case. It has a one-\nyear limited warranty. Diopter (D) is a technical term for the measurement of\nthe light curvature and thickness of a lens. A dioptric number and a\nmagnification number are not the same thing. Diopter strength represents a\nspecific magnification power (X). For example, a 5-diopter provides 2.5X\nmagnification (at a distance of 8”). See the magnification chart. The higher\nthe diopter, the more magnification a lens can provide. As magnification\nincreases, distance to the object (focal length), and field of view (diameter,\nor narrowness of view) decreases. Magnifiers and prescription eyeglasses have\na diopter value, such as 1.5 or 2. The dioptric strength of an accessory lens,\nsuch as prescription eyeglasses or an eye loupe, must be added to the dioptric\nstrength of the magnifier to calculate total magnification. Magnifiers are\ndevices used to enlarge the visual appearance of an object or image.\nMagnifiers come in a variety of styles such as hand-held, headband, standing,\nclip-on, eye loupe, and those that hang in a necklace form, or fit in a\ntrouser pocket. Magnifiers are commonly made of plastic or glass. They can\nhave one or more lenses with varying magnification abilities, and can have a\nbinocular configuration with a single lens, or two separate lenses. They are\nsometimes used with LED or fluorescent light sources to help control viewing\ncapabilities. Magnifier ability is often expressed as magnification at a\nspecific length. For example, 1.75X at 14” means that when a magnifier is held\nat 14” from a viewer’s eyes, the object will be magnified 1.75 times (X) its\nactual size. As magnification increases, viewing areas and focal length\ndecrease. Magnifiers sometimes have a diopter number, expressed as + or -D,\nwhich is a measurement of strength (or power) of the lens. Some magnifiers are\nmarked with a dioptric number on the lens. A high diopter number has a higher\nmagnification than a low diopter number. Aspheric magnifiers, unlike spheric\nmagnifiers, produce a sharp image to the edge of the lens for less distortion.\nMagnifiers are widely used in jewelry inspection and fabrication, watch-\nmaking, needlework, artwork, reading, print inspection, and stamp-collecting.\nDetermining Magnification Diopter Magnification Focal length (Distance from\nobject) Sample view 20\/20 vision 20\" (50.8cm) 2-diopter lens 1.50X 20\"\n(50.8cm) 3-diopter lens 1.75X 14\" (35.56cm) 4-diopter lens 2.00X 10\" (25.4cm)\n5-diopter lens 2.50X 8\" (20.32cm) 7-diopter lens 2.75X 6\" (15.24cm) 10-diopter\nlens 3.50X 4\" (10.16cm) Donegan Optical manufactures and distributes precision\nvisual devices for hobbyists and professionals in industry, home, office and\ncrafts applications. The company was founded in 1952 and is headquartered in\nLenexa, Kansas. What’s in the Box? OptiVISOR Fitted, plastic, carrying case\nInstruction manual\u003c\/p\u003e \n\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n \u003cul class=\"a\"\u003e\n \u003cli\u003eHeadband binocular visor with snap-in 1.5X magnifying lens plate for hands-free viewing\u003c\/li\u003e\n \u003cli\u003eGround and polished glass prismatic lens for improved focus and reduced eye strain\u003c\/li\u003e\n \u003cli\u003eVisor size-adjustment knob for customized fit\u003c\/li\u003e\n \u003cli\u003eVisor tilts out of way when not needed\u003c\/li\u003e\n \u003cli\u003e20\" focal length for a variety of uses\u003c\/li\u003e\n \u003c\/ul\u003e\n\n","published_at":"2022-03-19T03:56:39+11:00","created_at":"2022-03-19T03:56:39+11:00","vendor":"Donegan Optical","type":"Magnifiers","tags":["auspowers_batchone"],"price":26000,"price_min":26000,"price_max":26000,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":41335355474100,"title":"1.5x Magnification, 20\" Focal Length","option1":"1.5x Magnification, 20\" Focal Length","option2":null,"option3":null,"sku":"B000EM98KM","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Donegan DA-2 OptiVISOR Headband Magnifier, 1.5X Magnification Glass Lens Plate, 20\" Focal Length 1.5x Magnification, 20\" Focal Length - 1.5x Magnification, 20\" Focal Length","public_title":"1.5x Magnification, 20\" Focal Length","options":["1.5x Magnification, 20\" Focal Length"],"price":26000,"weight":227,"compare_at_price":null,"inventory_management":null,"barcode":"633096000472","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/auspowers.com\/cdn\/shop\/products\/B000EM98KM.jpg?v=1648580013"],"featured_image":"\/\/auspowers.com\/cdn\/shop\/products\/B000EM98KM.jpg?v=1648580013","options":["Size"],"media":[{"alt":"[Australia - AusPower] - Donegan DA-2 OptiVISOR Headband Magnifier, 1.5X Magnification Glass Lens Plate, 20\" Focal Length 1.5x Magnification, 20\" Focal Length ","id":25351585857716,"position":1,"preview_image":{"aspect_ratio":1.455,"height":1007,"width":1465,"src":"\/\/auspowers.com\/cdn\/shop\/products\/B000EM98KM.jpg?v=1648580013"},"aspect_ratio":1.455,"height":1007,"media_type":"image","src":"\/\/auspowers.com\/cdn\/shop\/products\/B000EM98KM.jpg?v=1648580013","width":1465}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch3\u003eDonegan DA-2 OptiVISOR Headband Magnifier, 1.5X Magnification Glass Lens Plate, 20\" Focal Length\u003c\/h3\u003e\n\u003cp id=\"b\"\u003eThe Donegan OptiVISOR is a hands-free, headband binocular magnifier that has\noptical glass lenses that are ground and polished into prismatic lenses for\nquality and clarity, and is available in multiple dioptric strengths\n(indicated by the number in the model) which provide specific magnification\npower (X) at specific focal lengths, or distance from object. This magnifier\nenhances the size and resolution of an object or image, and is commonly used\nfor a variety of applications such as jewelry-making, watch- making,\nneedlework, artwork, electronic inspection, book-reading, print inspection,\nand stamp-collecting. The OptiVISOR magnifier features replaceable binocular\nlenses that have beveled edges that are mounted in an interchangeable plastic\nframe. An adjustable headband with padded leather comfort band conforms to a\nvariety of head sizes and provides comfort for hours of continuous use. It can\nbe worn over prescription or safety eyeglasses. A durable, plastic visor tips\nup above the forehead when not in use. Spring-loaded pivot screws hold the\nheadband in a raised or a forward-facing position. The magnifier weighs 0.67\nlbs., and comes housed in a protective shell and carrying case. It has a one-\nyear limited warranty. Diopter (D) is a technical term for the measurement of\nthe light curvature and thickness of a lens. A dioptric number and a\nmagnification number are not the same thing. Diopter strength represents a\nspecific magnification power (X). For example, a 5-diopter provides 2.5X\nmagnification (at a distance of 8”). See the magnification chart. The higher\nthe diopter, the more magnification a lens can provide. As magnification\nincreases, distance to the object (focal length), and field of view (diameter,\nor narrowness of view) decreases. Magnifiers and prescription eyeglasses have\na diopter value, such as 1.5 or 2. The dioptric strength of an accessory lens,\nsuch as prescription eyeglasses or an eye loupe, must be added to the dioptric\nstrength of the magnifier to calculate total magnification. Magnifiers are\ndevices used to enlarge the visual appearance of an object or image.\nMagnifiers come in a variety of styles such as hand-held, headband, standing,\nclip-on, eye loupe, and those that hang in a necklace form, or fit in a\ntrouser pocket. Magnifiers are commonly made of plastic or glass. They can\nhave one or more lenses with varying magnification abilities, and can have a\nbinocular configuration with a single lens, or two separate lenses. They are\nsometimes used with LED or fluorescent light sources to help control viewing\ncapabilities. Magnifier ability is often expressed as magnification at a\nspecific length. For example, 1.75X at 14” means that when a magnifier is held\nat 14” from a viewer’s eyes, the object will be magnified 1.75 times (X) its\nactual size. As magnification increases, viewing areas and focal length\ndecrease. Magnifiers sometimes have a diopter number, expressed as + or -D,\nwhich is a measurement of strength (or power) of the lens. Some magnifiers are\nmarked with a dioptric number on the lens. A high diopter number has a higher\nmagnification than a low diopter number. Aspheric magnifiers, unlike spheric\nmagnifiers, produce a sharp image to the edge of the lens for less distortion.\nMagnifiers are widely used in jewelry inspection and fabrication, watch-\nmaking, needlework, artwork, reading, print inspection, and stamp-collecting.\nDetermining Magnification Diopter Magnification Focal length (Distance from\nobject) Sample view 20\/20 vision 20\" (50.8cm) 2-diopter lens 1.50X 20\"\n(50.8cm) 3-diopter lens 1.75X 14\" (35.56cm) 4-diopter lens 2.00X 10\" (25.4cm)\n5-diopter lens 2.50X 8\" (20.32cm) 7-diopter lens 2.75X 6\" (15.24cm) 10-diopter\nlens 3.50X 4\" (10.16cm) Donegan Optical manufactures and distributes precision\nvisual devices for hobbyists and professionals in industry, home, office and\ncrafts applications. The company was founded in 1952 and is headquartered in\nLenexa, Kansas. What’s in the Box? OptiVISOR Fitted, plastic, carrying case\nInstruction manual\u003c\/p\u003e \n\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n \u003cul class=\"a\"\u003e\n \u003cli\u003eHeadband binocular visor with snap-in 1.5X magnifying lens plate for hands-free viewing\u003c\/li\u003e\n \u003cli\u003eGround and polished glass prismatic lens for improved focus and reduced eye strain\u003c\/li\u003e\n \u003cli\u003eVisor size-adjustment knob for customized fit\u003c\/li\u003e\n \u003cli\u003eVisor tilts out of way when not needed\u003c\/li\u003e\n \u003cli\u003e20\" focal length for a variety of uses\u003c\/li\u003e\n \u003c\/ul\u003e\n\n"}
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Donegan DA-2 OptiVISOR Headband Magnifier, 1.5X Magnification Glass Lens Plate, 20" Focal Length 1.5x Magnification, 20" Focal Length

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Donegan DA-2 OptiVISOR Headband Magnifier, 1.5X Magnification Glass Lens Plate, 20" Focal Length

The Donegan OptiVISOR is a hands-free, headband binocular magnifier that has optical glass lenses that are ground and polished into prismatic lenses for quality and clarity, and is available in multiple dioptric strengths (indicated by the number in the model) which provide specific magnification power (X) at specific 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 magnifier features replaceable binocular lenses that have beveled edges that are mounted in an interchangeable plastic frame. 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”). See the magnification chart. 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 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. Determining Magnification Diopter Magnification Focal length (Distance from object) Sample view 20/20 vision 20" (50.8cm) 2-diopter lens 1.50X 20" (50.8cm) 3-diopter lens 1.75X 14" (35.56cm) 4-diopter lens 2.00X 10" (25.4cm) 5-diopter lens 2.50X 8" (20.32cm) 7-diopter lens 2.75X 6" (15.24cm) 10-diopter lens 3.50X 4" (10.16cm) 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 Fitted, plastic, carrying case Instruction manual

Product Features

  • Headband binocular visor with snap-in 1.5X magnifying lens plate for hands-free viewing
  • Ground and polished glass prismatic lens for improved focus and reduced eye strain
  • Visor size-adjustment knob for customized fit
  • Visor tilts out of way when not needed
  • 20" focal length for a variety of uses

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