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April 14, 2025
Bought these for my middle school science class to make their own telescopes. Was a really fun lab and they worked great!
Sandy Seas
March 17, 2025
Believe it or not, I use these for wood burning from the sun. Learned this trick in Girl Scouts LOL
Beach reader
March 15, 2025
I got the double concave to use with art, to check my accuracy in likenesses for portraits. The double concave ends up giving you a virtual image, as if you are looking at your drawing in the mirror, except it's not reversed. Don't ask me how it works, but it lets you see what's "off" more easily. I also bought the double convex just because it was included, but I have already used it several times to magnify small print, or zoom in on a drawing reference detail. Don't know why, but I find it much more enjoyable to use than a magnifying glass -- maybe because there's no distracting handle or frame. Very nice purchase. Glad I got both.
Andrew
March 8, 2025
These are amazing lenses! Perfect quality, worked great for my experiments and for a demo for my Physics course!
Debora from Oakland
January 7, 2025
These work well for my students and are large enough to hold and demonstrate the differences.
Customer
December 31, 2024
Scratched, cannot use
Dave Chapman
December 11, 2024
Not much to say. They are made of glass, and focus light.No issues I can see.
Peter Gordon
December 4, 2024
Is what it says it is. Very quick delivery to the UK
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