5 Pack of Opticlens Brand 7" x 10.25" Fresnel Lens - Magnifier, Reading Aid + Solar Oven + DIY Projection TV Projects

Bought the 5 pack. Quite clear image when used properly.I got these to build my own phone magnification screen. So far, these are very capable of that goal. Works well with my proof of concept rig.

These are awesome to be able to read again. I also bought some for my church family. Easily adjustable to what you need. It takes a minute to find your sweet spot, but once you do, you are reading again. This works on all different print. You can move it up or down depending on what you're reading. I highly recommend these.

Used as a light diffuser worked great

I wouldn't use these as readers...not enough magnification for the 'fogginess' they impart. Some people do, you might like them. They are excellent for fire-starters...70 square inches compared to ~3 for the average handheld mag glass...they are nuclear in comparison. (In both reading and heating it does make a little difference which side is used for what.)

I love these sheets. I have used some as they are and some I cut in half and kept in my purse. I heartily recommend.

I expected greater magnification

The package arrived in a nice manila envelope and I took one out and tested it as a fire starter for bushcraft use. It had a campfire started in under 40 seconds. Well worth the cost and a really nice addition to my backpack and survival kits. The advice to keep the lenses in the plastic sleeves is a good idea too - as other reviewers have noted. I will keep my individual lenses in envelopes to protect them until they are needed.

It works surprisingly well for a cheap plastic fresnel lens. Magnification, resolution, and distortion levels are all good. The plastic scratches very easily so you might need to pull out a fresh one every other week. But since they come in a five-pack and cost so little that is OK. I am going to buy several more packs.