Black Lens News is a monthly African-American newspaper based in Spokane, Washington. The newspaper was founded in 2015 by Sandra Williams who acts as...

visible light are also called "lenses", such as microwave lenses, electron lenses, acoustic lenses, or explosive lenses. Lenses are used in various imaging...

Contact lenses, or simply contacts, are thin lenses placed directly on the surface of the eyes. Contact lenses are ocular prosthetic devices used by over...

Racing Club de Lens (French pronunciation: [ʁasiŋ klœb də lɑ̃s]), commonly referred to as RC Lens or simply Lens, is a French professional football club...

Washington civil rights activist Sandy Williams, founder and editor of Black Lens News, as well as actress Megan Hilty's pregnant sister, brother-in-law,...

an isolated black hole. Another possibility for observing gravitational lensing by a black hole would be to observe stars orbiting the black hole. There...

A gravitational lens is matter, such as a cluster of galaxies or a point particle, that bends light from a distant source as it travels toward an observer...

(sometimes referred to as a mirrorless interchangeable-lens camera, MILC, or digital single-lens mirrorless, DSLM) is a digital camera which, in contrast...

The EF lens mount is the standard lens mount on the Canon EOS family of SLR film and digital cameras. EF stands for "Electro-Focus": automatic focusing...

A single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits...