In the bone-dry heights of Chile’s Atacama Desert, scientists have just flipped the switch on a machine that could rewrite the story of the universe. Perched atop the Vera C. Rubin Observatory is the ...

To control light, curved lenses are used today, that are often made of glass that is either concave or convex, which refracts the light in different ways. These types of lenses can be found in ...

What is a mirror lens exactly? And have they got a new lease of life when used on mirrorless cameras? I've been trying them ...

A plano-concave lens is a lens with one side being flat and the other side being concave. It is characterized by being thin in the center and thick at the edges, and can make parallel light rays ...

A 2-inch telescope will have a primary or “objective” lens with an aperture of about 3 square inches. The lens in a 4-inch telescope has a much larger 12-square-inch light collecting area.

His device, called a kijker (“looker”), was, according to Hans, able to magnify an image up to three times. It consisted of a concave eyepiece that was aligned with another convex objective lens.

This innovation, stemming from the work of the University of Utah, could transform both ground-based and space telescopes by reducing their weight and improving their performance. Flat lenses, ...

For the first time, a flat telescope lens has been produced that represents colors accurately, offering a way to make less bulky lenses that could be sent into space cheaply. The first telescopes ...

“A mirror, a concave mirror, a convex mirror, and a double-convex lens. A mirror and a concave mirror are what we call a katoptron and an enoptron. A convex mirror is what we call a phanarion. As for ...

Though astronomers still gaze at the stars, most telescopes are now in effect cameras. Essential part is a concave spherical mirror which gathers starlight, focuses it on a photographic plate. But ...

Convex and concave lenses are the primary types. Lens Use Cases Include: Telescopes and Microscopes: Magnifying objects for observation purposes.