- Replacement lens plate for OptiVISOR magnifier which 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 that provide a specific magnification power (X), depending on the distance from the object (focal length)
- 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-grade, acrylic lens plate ground and polished into a prismatic lens for quality, clarity, and durability
- High-strength, durable plastic lens plate offers simple fit in OptiVISOR magnifier visor
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Donegan Replacement Lens for Opti-Visor
|Price:||$16.59 - $142.56|
|Sale:||Lower price available on select options|
|Brand Name||Donegan Optical|
The Donegan replacement lens plate for the OptiVISOR hands... See more product details
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The Donegan replacement lens plate for the OptiVISOR hands-free, headband binocular magnifier, has an optical-grade, acrylic lens ground and polished into a prismatic lens, and is available in multiple dioptric strengths 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, knitting, artwork, electronic inspection, book-reading, print inspection, and stamp-collecting.
(Distance from Object)
The OptiVISOR replacement lens plate is made of a durable plastic material. It is constructed to interchange in and out of the OptiVISOR body with ease. The replacement lens plate comes housed in a protective carrying case, and 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 inspection and fabrication, watch-making, electronic inspection, 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?
- Replacement lens plate for OptiVISOR magnifier
- Fitted carrying case
- Instruction manual
Top Customer Reviews
I normally use reading glasses when working on scale models. But if I use any of the stronger magnification optivisor lenses, I can't use them in conjunction with the reading glasses, the visor becomes too strong and the focal length too short. That means I have to keep switching between glasses and visor. Doesn't work very well. But with these weaker lenses I can keep the reading glasses on and get a reasonable focal length, and can flip them up when I don't need the visor. problem solved!
Optivisor optics are clear and true - I am very pleased with the clarity of their optics - they are true and coma-free all the way to the edge of the field of view.
Also, for my aging eyes they are a great tool for certain types of bench tasks where I need a little aid - whether it is working on electronics, soldering a small joint, inspecting a broken part I am trying to repair... of course there are many uses for a magnifier. And a magnifier that is hands free, one that can be flipped up when not in use, and is comfortable to wear... well, that is why I can recommend the Optivisor (and alternate attachment lenses) to anyone!
Now I am trying to decide if I want another lens to swap out at even higher power for those times I REALLY want to "blow something up".
Thanks for reading!
older. Great service with prompt shipping.
Most Recent Customer Reviews
A handy tool for geezers of the sea to use when tying terminal gear on lines, particularly for small hooks and lures etc.Published 14 days ago by Sea Dawg
Product came in perfect condition and worked as described. Would order again.Published 15 days ago by Beatrice Sarver
I do a lot of modeling at 1/144 scale and these lens really bring things up close and personal. You have to bee around 4 inches from what you are looking at but for really tiny... Read morePublished 24 days ago by Ron Morgan
Needed an extra lens for jobs that didn't require so much magnification. Same as the original lens in quality and utility. Very satisfied with the product.Published 2 months ago by John Oswald Jr
I find doing the needlework I enjoy takes extra good vision. This lens is absolutely wonderful.Published 3 months ago by Irene McLean