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

Does a great job for what it was bought for.

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!

I purchased this to demonstrate solar fire starting. For solar focusing, it has 4-5 times the collection area of most "normal" hand-held lenses. If there is no cloud cover, once aligned but out of focus, you can ignite most damp or dry flamable material within a second of bringing it to focus. Note: never look at the concentrated sun without eye protection! It also doubles as a very large normal magnifier. It has some distortion, but it's still very usable. Overall, it does not lay perfectly flat at rest, and when holding you might need to apply some tension to force it to lay flat. It's a good value for the money.

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.

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.

This things really works. I started a fire with it. I just wish the man who invented it would have recognized early on that he was going to be an inventor and that he should change his name to something cooler. Like "Orlando Lens" or "Lily Lens" "Alvarez Lemsor ... Oh well, I guess we're stuck with Fresnel.

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.

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

I received my order, & I'm so happy with my Full Page Magnifier. I know I made the right choice. Now I can curl up with my books, & not have to worry about the weight, nor moving a smaller magnifier around. I even use it to look in the tv guide, to see what's on. More than happy with my purchase

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.