|Item Weight||0.96 ounces|
|Product Dimensions||10.2 x 0.1 x 7 inches|
|Item model number||FRSLENS3X|
|Manufacturer Part Number||FRSLENS3X|
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8x10" Fresnel Lens Full Page Magnifying Sheet - 2mm Thick
|Price:||$3.67 + $1.82 shipping|
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- Lens measures 8x10"
- Lens is 2mm thick
- Magnifies up to 3X
- Great for magnifying full pages for easier reading
- Thickness gives it extra durability
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This 8 in x 10 in x 2mm thick magnifying plastic sheet is great for optics / science projects, for reading or just fun. A French physicist named Augustin Fresnel invented this lens in 1822 to be used in lighthouses. The construction of Fresnel lens is quite interesting as it allows magnification just like regular glass lenses do but it can be as thin as paper! This particular fresnel lens sheet is 2mm thick, offering more durability than most lens sheets, making it useful wherever it may be needed.
A Fresnel lens can be made as large as desired without making it thicker due to concentric rings placed on the flat surface. Magnify objects or concentrate solar power to a fine point. This is a great tool for reading small type or magnifying small flora.
Fresnel lenses are a great addition to any scale modelers toolbox to enhance one's ability work on the small models, or even as a cover for stationary models such as lighthouses. Other possibilities include being used as the window glass for LED illuminated highlights, as well as house or store windows.
Top customer reviews
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For those who may not understand how the Fresnel lens works, there is no magnification if the lens is directly against the object or sheet you are trying to magnify. As you pull away holding the lens, what you view will gradually magnify. As far as I can tell, the maximum 3X magnification for this particular lens is approximately six inches from what you are viewing.
This magnifier is not as flimsy and unwieldy as some suggest. It is possible to comfortably hold the lens in landscape (horizontally) with one hand at the bottom corner as the product image suggests, but you will find it more effective and easier to manage if you use two hands in landscape. Holding it in portrait (vertically) with one or two hands is not as comfortable, personally.
The best explanation videos on Fresnel lens (to show your kids who are old enough to understand the video) are by VegaScienceTrust on u tube. I'm not affiliated with them in any way.
Had I wanted it to magnify text for reading (as advertised) I would have rated 2 stars. The lens arrived damaged because seller doesn't package in manner protecting lens from mere pen-pressure applied to mailing envelope. When they filled in shipping address on mailing envelope, their pen pressured through and wrote permanently (damaged) into the Fresnel ridges on the lens. I cannot imagine why Seller would PUT LENS INTO ENVELOPE BEFORE WRITING ON ENVELOPE! The result is that anything written upon envelope gets permanently marked (scratched) into the Fresnel ridges, and you'll see that every time you look through the lens. It cannot be removed.
This product is too flimsy for unsupported use. The best fix is use scotch tape to mount it onto 8 X 10 inch cheap photo frame, obviously first removing all parts (glass, backing board, etc) from center of photo frame.
prevent children from having any access to this lens unless you are with them and you are holding the lens at all times. In sunlight, this lens is at least as dangerous as a cigarette lighter, for a child. It can focus sunlight to bring most anything to flame within seconds. Caution it is easy to forget that reflective surfaces can easily redirect the Fresnel-focused sunlight and permanently damage eyes in a split second. Have everyone wear dark sunglasses, and never focus sunlight upon a highly reflective surface.
Anticipating your question, we did NOT have any accidents when using this product. We have common sense and followed above rules.
If only I had read all the reviews before I enthusiastically ordered this lens...
It doesn't work if you place it flat on the page. You have to carefully position above your page (or newspaper, while juggling coffee with your other hand) and Doonesbury print might still be too miniscule to read.
Consider yourself warned.
Most recent customer reviews
the chipped corner has sharp plastic edges and can cut you if you're not careful.