Related topics: iphone · nasa · digital camera

Illuminating a biological light switch

Using an innovative new imaging technique, researchers at Weill Cornell Medicine have revealed the inner workings of a family of light-sensing molecules in unprecedented detail and speed. The work could inform new strategies ...

Study reveals the earliest record of angiosperms in North America

A new study by Prof. Wang Xin from the Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences (NIGPAS) reported a new angiosperm fruit, Dilcherifructus mexicana gen. et sp. nov, from the Middle Jurassic ...

Hubble views a tranquil galaxy with an explosive past

The lazily winding spiral arms of the spectacular galaxy NGC 976 fill the frame of this image from the NASA/ESA Hubble Space Telescope. This spiral galaxy lies around 150 million light-years from the Milky Way in the constellation ...

Why doesn't Webb have deployment cameras?

As NASA's James Webb Space Telescope makes its way out to its intended orbit, ground teams monitor its vitals using a comprehensive set of sensors located throughout the entire spacecraft. Mechanical, thermal, and electrical ...

Image: Hubble sees cosmic clues in a galactic duo

This spectacular image from the NASA/ESA Hubble Space Telescope captures the spiral galaxy NGC 105, which lies roughly 215 million light-years away in the constellation Pisces. While it looks like NGC 105 is plunging edge-on ...

Largest collection of free-floating planets found in the Milky Way

Using observations and archival data from several of NSF's NOIRLab's observatories, together with observations from telescopes around the world and in orbit, astronomers have discovered at least 70 new free-floating planets—planets ...

Sea turtles return to Thailand's shores during pandemic

After laying eggs on a deserted Thai beach, a green sea turtle dives back into the turquoise-coloured waters of the Andaman Sea—a welcome sight for biologists who say the absence of tourists spurred the marine animal's ...

How a floating fern withstands rain

The tropical floating fern Salvinia molesta has developed sophisticated structures to allow water to roll off its leaves quickly—even during heavy rainfall. This relieves the pressure on the leaves floating on the water ...

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Camera

A camera is a device that records images, either as a still photograph or as moving images known as videos or movies. The term comes from the camera obscura (Latin for "dark chamber"), an early mechanism of projecting images where an entire room functioned as a real-time imaging system; the modern camera evolved from the camera obscura.

Cameras may work with the light of the visible spectrum or with other portions of the electromagnetic spectrum. A camera generally consists of an enclosed hollow with an opening (aperture) at one end for light to enter, and a recording or viewing surface for capturing the light at the other end. A majority of cameras have a lens positioned in front of the camera's opening to gather the incoming light and focus all or part of the image on the recording surface. The diameter of the aperture is often controlled by a diaphragm mechanism, but some cameras have a fixed-size aperture.

A typical still camera takes one photo each time the user presses the shutter button. A typical movie camera continuously takes 24 film frames per second as long as the user holds down the shutter button.

This text uses material from Wikipedia, licensed under CC BY-SA