Description: A lens which is specially designed to control the effects of chromatic distortion or aberration ... An achromatic doublet is made from a pair of glasses, of which one is typically a ...

Dark matter affects how stars move within galaxies, how galaxies build up over time, and how everything in the universe is held together—but no existing tool has directly detected it. While dark ...

Combining the way that massive galaxies and galaxy clusters bend space and magnify our view of the distant universe with ...

The lens you count on for some of your most important shots can leave you dead in the water. Here’s a few things to be ...