Photography is the art, science, and practice of creating durable images by recording light by means of an image sensor. Typically, a lens is used to focus the light reflected or emitted from objects into a real image on the light-sensitive surface inside a camera during a timed exposure. The result in an electronic image sensor is an electrical charge at each pixel, which is electronically processed and stored in a digital image file for subsequent display or processing. Photography came from the word fotos (light) and graphos (to draw). It is like painting with light. Photography is more than just taking a photograph with a camera… … it is an active engagement with science, technology & society and art… Basics of Photography: Understanding How Your Digital Camera Works The Parts
Your camera is made up of many parts, but there are a few in particular that we want to look at as they are the most important. We'll go into much more detail in a bit, but here's a basic overview of the parts we're going to look at: * The body is the housing for your camera. While it has little effect on the quality of your photos, it does affect things like ease of use and comfort. * The lens is the eye of the camera, and it's a very complex instrument. Different lenses can provide many different features, so it's important to know the differences between them. In future lessons, we'll also discuss how lenses work and how that affects your photographs. * The sensor is basically the digital equivalent of film, in the sense that—like film—the sensor is exposed to light that comes through the lens and it records that exposure. The exposure is then processed and saved to flash memory (generally an SD or Compact Flash card). The caliber and size of the sensor are also very important, as these things significantly impact the quality of your photos. * The flash card is where you save your images, and it's a component most people don't think about too much when buying a camera, aside from choosing an amount of storage that suits their needs. Flash cards range in read and write speeds as well, however, and a slow cards can significantly degrade your camera's performance. We'll take a look at what card classes mean and the minimum speed you need for different purposes. * The battery matters in a camera just like any other electronic device. While this is a simple part to understand, we'll dive into it a little more deeply to figure out actual, practical battery life for cameras and when cameras with less-powerful batteries may be a better option.
Camera body design affects the user in a couple of ways. First, the size of the body can have a major impact on comfort when being held and used. Small hands will have difficulty with large bodies and, conversely, large hands will have difficulty with small bodies. Before purchasing a camera, it's a good idea to hold it and take a few pictures so you know if you'll find it comfortable to use with regularity. Size often impacts the location of buttons, dials, and other parts of the hardware you'll need to touch and press to operate your camera. The positioning on small point-and-shoot cameras tends to be fairly simple, because there are fewer hardware controls, but the moment you step up to a smaller DSLR that number increases significantly. On higher-end DSLRs, the extra space tends to ensure your hands will always be able to reach and easily access the most important controls. This is a generalization, however, and you'll want to test them out for yourself. When you do, adjust camera settings and see what all the buttons do in manual mode (so you're aware of their full capabilities). If it feels uncomfortable or awkward to make adjustments you'll make often, you may want to consider a different model. While most cameras are fairly similar, the little differences in body design can have a significant impact on their ease of use. While you can...
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