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The lenses were supplied as described, a small box containing 3 double convex and 3 double concave lenses each packed in a separate and labeled envelope. The lenses are highly polished to reduce aberrations to a minimum. However, short focal length lenses are better suited for classroom demonstrations. I would prefer 10, 20, 30 mm instead of 20, 30, 50 mm.

I was pleased to receive the lenses. The lenses are of good quality, I recommend them to everyone. From microscope to tele. It will keep me busy. You can't find a selection when you come to the store. These will come in handy as I will be making a telephoto lens for my camera. And they're inexpensive too. I've seen the same lenses on other sites for double the price. I'm really happy with this purchase.

Very good value for money. Clear glass, and if you have no idea what a specific focal length means, then don't buy those random lenses. With some lenses, however, the surface appears grainy rather than smooth. Also small chips. I've only noticed this on closer inspection (I'm picky) in fairly strong light and I'm sure it won't noticeably affect performance (I intend to build an optical bench). The convex lenses create a nice clear image of my sunny garden on the wall. If you place convex lenses