Thursday 15 October 2009

The basics of a Camera










Pinhole Cameras are possibly the most basic kind of camera, using no motorised or electronic parts. Here are the basics of what is used to make pictures with a camera.









  • Basic description

A Camera is a device that records images, either still or 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.

  • Shutter

In photography, a shutter is a device that allows light to pass for a determined period of time, for the purpose of exposing photographic film or a light-sensitive electronic sensor to light to capture a permanent image of a scene.

  • Aperture

In optics, an aperture is a hole or an opening through which light travels. In photography this can be measured in increments called f-stops.

  • Lens

The Lens of a camera captures the light from the subject and brings it to focus on the film.

  • Exposure control

The size of the aperture and the brightness of the scene controls the amount of the light that enters the camera during a period of time, and the shutter controls the length of time that the light hits the recording surface. Equivalent exposures can be made with a larger aperture and faster shutter speed or a corresponding smaller aperture and with the shutter speed slowed down.

Below are some examples of pictures taken with a pinhole camera...

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