8.3" x 11.75" LARGE 3X Fresnel Lens FULL PAGE Magnifier -- Solar Oven/DIY Projection TV PLANS (1 pack PREMIUM GRADE Large Lens)

Main reason I got it. In 71 degree weather, it lights up a chip pile in a flash. I will be using it to make a solar still for water and so far it looks promising with one more added. Nice add to the trailer for starting fires. You won't be disappointed in that area but as a magnifier, it is a little less than desirable. It is ok on print for instructions, books but finer print like on a USB charger, (what I tested it on) it isn't clear enough to make out the info. Still worth the money to me.

UPDATE: Sunny, breezy day. Got it to focus. Burned paper (ignited). Burned stubborn pine twig (surprised to see a mini torch). Even through the protective plastic wrapper. Can't truly complain. Worked like the picture. ORIGINAL REVIEW: The fellow burning something in the picture is probably having to hold the lens very carefully. It's flexible. Will update after I've had enough sun to play with it a bit. I didn't deduct more stars because it's basically a page magnifier.

Nice for refracting light also

So I bought this 42 purposes 12 be able to start a fire with one of them and the other to be used in an office to read the smaller fine print which it does a great job at both but do be warned it will absolutely start a fire on accident if you are not well aware of where the Sun is and how you are holding the thing I accidentally burnt a hole straight through my pants with it because I wasn't paying enough attention while holding it outside. So if you're planning on using one of these as a fire starter I will let you know right away that it works fantastically.

Really quite something, I would say this is quite a modern marvel and I'm amazed I have only just recently discovered what a Fresnel lens is and that it exists. Even auto correct red-lined the word Fresnel while writing this review, goes to show how unheard of they are! Anyways this thing lit up GREEN grass the first time I tried it in full sunlight. Wow. Probably the single best fire starter for survival I've ever came across, and the possibilities for other uses are up to your imagination. Super lightweight, super cheap, VERY durable and bendable, and incredibly powerful, so much that you really have to make sure not to leave this lying around on a sunny day. Definitely not a toy for kids or carelessness. All in all exceeded my expectations and really amazing little device!

One inch of a corner cracked and broken. Will try and use it anyway. Should have better packaging for mailing.

Works great. Exactly as it should. Affordable, durable, very light, about 12 inches long, easily magnified the solar light and concentrated it to a laser which cooked anything to over 1200 c.

Clear, great magnification, good thickness, easy to use for computer screen, books newspaper, or anything. Much better field of vision than a magnifying glass. If you'll pardon the pun, very Handy! Other possible uses: Heating food or starting a fire with focused light from the sun. Would certainly provide more light to a solar cell, increasing the solar cell output.

I bought the 8.3" x 11.75" Large 3X Fresnel Lens Full Page Magnifier, one for myself, one for my sister, primarily for reading books, prescription bottles, and ingredient panels on products in stores because I have some visual difficulties arising from Lyme Tick Eye Disease. I had NO idea there were so many other great uses for a Fresnel lens which appeal to survivalist/preppers like my sister and me! You can start a fire with it, much like you would using a hand-held magnifying glass, only faster and better! It is extremely useful for reading paper maps on driving trips. It is durable, flexible, and easy to store. I can also use it in my organic garden, to inspect my seedlings, and check my vine fruits for any destructive insects. I plan to buy more this spring for my 3 school-age grandchildren. They can use it to explore nature (insects, leaves, plants, flowers), for their viewing their stamp collections, and for examining fossils or seashells they find on the beach. Makes a great gift for recipients of ANY age! RECOMMENDED!

good product

As soon as I started to bring focus to a piece of wood on a sunny spring day, the wood burst into flames! It was even burning paper with some hazy cloud in the air.

A good product that can be kept handy to check out docs n drawings and other details that are minute nnhard to see clearly. Quality also decent.

It does what it is supposed to do. It magnifies. My only problem is that the edges are blurred so you have to concentrate on the middle section of the magnifier. I wish the whole thing magnified. It still works good though.