HowStuffWorks How Cameras Work

Photography is undoubtedly one of the most important inven­tions in history — it has truly transformed how people conceive of the world. Now we can see all sorts of things that are actually many miles — and years — away from us. Photography lets us capture moments in time and preserve them for years to come.

This effectively reverses tCamerashe path of light from an object. A light source — say a candle — emits light in all directions. The rays of light all start at the same point — the candles flame — and then are constantly diverging. A converging lens takes those rays and redirects them so they are all converging back to one point. At the point where the rays converge, you get a real image of the candle. In the next couple of sections, well look at some of the variables that determine how this real image is formed.­

The basic technology that makes all of this possible is irly . A still film camera is made of three basic elements: an optical element (the lens), a chemical element (the film) and a mechanical element (the camera body itself). As well see, the only trick to photography is calibrating and combining these elements in such a way that they record a crisp, recognizable image.

There are many different ways of bringing everything together. In this article, well look at a manual single-lens-reflex (SLR) camera. This is a camera where the photographer sees exactly the same image that is exposed to the film and can adjust everything by turning dials and clicking buttons. Since it doesnt need any electricity to take a picture, a manual SLR camera provides an excellent illustration of the fundamental processes of photography.

The effect on light is the same — as it enters the glass at an angle, it bends in one direction. It bends again when it exits the glass because parts of the light wave enter the air and speed up before other parts of the wave. In a standard converging, or convex lens, Cameras,new york asian escort one or both sides of the glass curves out. This means rays of light passing through will bend toward the center oHowStuffWorks How Cameras Work,f the lens on entry. In a double convex lens, such as a magnifying glass, the light will bend when it exits as well as when it enters.

But how can a piece of glass do this? The process is actually very . As light travels from one medium to another, it changes speed. Light travels more quickly through air than it does through glass, so a lens slows it down.

How WiFi Cameras WorkWiFi cameras can send digital photos straight to your computer or Web space as long as youre near a wireless connection. How do these cameras work to upload your photos wirelessly?

The optical component of the camera is the lens. At its st, a lens is just a curved piece of glass or plastic. Its job is to take the beams of light bouncing off of an object and redirect them so they come together to form a real image — an image that looks just like the scene in front of the lens.

How Shutter Speed WorksWhen you press the button on your camera and hear that distinctive click, youre really hearing the sound of the cameras shutter opening and closing in a fraction of a second. That time — that is, your cameras shutter speed — can dramatically alter photo quality.

Harris, Tom. How Cameras Work 21 March 2001. 27 May 2013.

When light waves enter a piece of glass at an angle, one part of the wave will reach the glass before another and so will start slowing down first. This is something like pushing a shopping cart from pavement to grass, at an angle. The right wheel hits the grass first and so slows down while the left wheel is still on the pavement. Because the left wheel is briefly moving more quickly than the right wheel, the shopping cart turns to the right as it moves onto the grass.


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