set of 75mm convex and concave lenses,20cm focal length

Good one

The lenses are very good - perfect ground and crystalline. I wonder where the laxness lies because one lens has rough edges at two places. Whoever is responsible needs to take proper care. My instant idea was to seek replacement, but I wanted to let it go at that and spared myself the risk of something no better.

Very good quality mirrors and lens that I was looking for my 12-year-old.

Good lenses

I was mainly looking for a Concave lens to be used as base for spinning tops. This one fitted perfectly as i expected (See the attached video) ,So I've given 5*. In this case it was a combo package, i wish there was only concave available, it would saved some bucks. Convex lens you can used for other purpose like magnification, experiment with sun energy or anything. Hope this review helps to those , who are looking for a base for their spinning tops

Glasses not clear small bubbles.

Quality is good. But received with little damage. Asked for replacement. Once received then will provide full feedback

Very nice, clear and good quality lenses. The sizes are exactly what wrote in descriptions. The packaging is very well. Thanks for nice product!