Headband magnifiers are convenient tools for painting miniatures, embroidery, puzzles, and more, keeping hands free and providing a closer look at fine details. To pick the best headband magnifier, ...

Enlarge a detail in your photo by peering through a fake magnifying glass Once you take a photo with a digital camera, you can do pretty much anything you want with it. You can tweak the exposure, ...

One of the best tools astronomers have to glimpse thedistant universe is a technology that nature invented. Cosmic magnifyingglasses called gravitational lenses help scientists zoom in on far-away ...

A double-convex lens is compose of two convex surfaces, has a positive focal length. Normally Bi-Convex lenses are most suitable where the object and image are on opposite sides of the lens, and are ...