Fresnel Lens, 100x100mm, Focal Length 50mm, Solar Death ray for Physics Classroom, Solar Heating, Fire Starter, Small Magnifier, DIY Optical Viewing Lens, VR Field,not Glass(Focal Length 50mm)

Fast shipping can’t wait to try it using it for starting a fire when outdoors /emergency situations

Works as described, good purchase.

It was a high quality lens but it was the wrong size for my application

Nice and sturdy lens. The size and optics properties are as advertised.

you'll have better luck starting a fire with 2 wet sticks

I have found this magnifying glass to be durable, as it has not developed any scratches and is easy to keep clean. However, I will mention that due to its smaller viewing area compared to traditional lenses, I sometimes find myself reaching for a different magnifying glass when I need to examine something in greater detail. Nonetheless, the Magnifier Fresnel Lens has been a welcome addition to my collection and serves its purpose well. I had fun making some 3D prints to give myself a couple of options for using the lens. First, I made one that is just a simple frame, so I could hold the lens or put it down without touching the lens itself. The second was the same frame, but I added a handle so my son and I could hold it easier.

This lens works very well to concentrate sunlight and can easily be used to start a fire on a sunny day. The lens can also be used for close inspection of items and reading fine print. The lens is light and sturdy / thin and so easy to stow in a bag or in a pocket.

Kinda of disappointed. The lens doesn’t seem to be very. Strong. I could be using it wrong. Still playing around with it..!!

cumplio con las expectativas