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Digital photography All-in-one desk reference 3rd edition - Busch D.

Busch D. Digital photography All-in-one desk reference 3rd edition - Wiley publishing, 2006. - 755 p.
ISBN: 0-470-03743-1
Download (direct link): digitalphotographyallinone2006.pdf
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You can find some general tips in Book I, Chapter 2 that can help you determine what category of camera you should look for. Read here, though, for the lowdown on everything you need to consider.
Examining the Parts of a Digital Camera
If you’re very new to digital cameras, you might be wondering what all those buttons, LEDs, and windows are for. Here’s a quick introduction to the key components of the average non-SLR digital camera. Not every camera will have all these features, and some will have additional features not shown in Figures 1-1 and 1-2.
? Shutter release: Pressing this button halfway locks exposure and focus; press all the way to take a picture.
? Control buttons: Miscellaneous control buttons might turn on/off close-up mode, automatic flash, or other features; set picture quality; or activate the self-timer.
? Shooting mode dial: Most cameras use this button or dial for changing among different scene modes (such as Night, Portrait, or Sports), adjusting automatic or manual exposure choices, selecting Movie mode, or switching into close-up mode.
? Microphone: This captures audio for movie clips and voice annotations; it can even activate a sound-triggered self-timer.
? Focus-assist light: This is an auxiliary illumination source that helps the camera focus in dim lighting conditions.
Examining the Parts of a Digital Camera
Focus-assist light
Electronic flash
Microphone Shutter release
Optical viewfinder
Control buttons
S hooting mode dial
Battery compartment Docking port
Lens cover Zoom lens
Figure 1-1: The front of a typical digital camera.
? Electronic flash: This provides light under dim conditions or helps fill in dark shadows.
? Optical viewfinder: This window, which doesn’t show exactly the same view that the lens captures, is for framing and composing your picture.
? Zoom lens: This magnifies and reduces the size of the image, taking you closer or moving you farther away.
? Lens cover: This protects the lens when the digital camera is turned off.
? Tripod socket: This allows you to attach the camera to a firm support, such as a tripod or monopod, plus other accessories, such as an external flash bracket.
? Docking port: Some cameras have a special dock that can be used to transfer photos, recharge the batteries, make prints, or perform other functions.
? Battery compartment: This contains the cells that power the camera.
? Power switch: Here is where you turn the camera on or off.
Book II Chapter 1
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Examining the Parts of a Digital Camera
? Indicator LEDs: These indicators show status, such as focus and exposure, often with green and red go/no go LEDs (light-emitting diodes).
? LCD (liquid crystal display) panel: This shows the sensor’s view of an image before exposure, shows preview images after exposure, and displays status, photo information, and menus.
? Display control/Menu button: This controls the amount of information shown in the LCD and produces menus. Some digital cameras have multiple buttons for recording menus, setup menus, and special functions.
? Picture review: Press this button to review the pictures you’ve already taken.
? Print/e-mail/share photos: Some digital cameras allow printing directly from the camera to compatible printers or marking pictures for printing or e-mailing later.
Evaluating Your Lens Requirements
? Cursor pad: Use this to navigate menu choices. Many digital cameras use the cursor buttons to activate frequently accessed features, such as flash options, macro mode, exposure value adjustments, and a self-timer.
? Set/Execute button: Press this to activate a feature or set a menu choice to the current selection.
? Memory card slot: This accepts digital memory cards.
? USB port: Use this to connect your camera directly to your computer or to a printer via a USB cable.
? File-save LED: This light usually flashes or lights up to indicate that an
image is currently being saved to the memory card. ^
? Power zoom control: Press this to zoom the lens in and out. Chapter 1
Evaluating Your Lens Requirements
The lens and the sensor (or film, in the case of a conventional camera) are the two most important parts of any photographic system. The lens gathers the light from your scene and focuses it onto the capture medium, digital or analog. The sensor or film transforms the light into something that can be stored permanently and viewed as a picture after digital or chemical processing.
Sharp lenses and high-quality sensors (or film) lead to technically good images; poor lenses and bad sensors lead to poor photos. Indeed, in one sense, most of the other components of a camera are for your convenience. Theoretically, you could mount a simple lens on one end of an oatmeal box, focus it on a piece of film or a sensor affixed to the inside of the other end of the box, and make an exposure by covering and uncovering the lens with a dark cloth. Of course, the digital version of this science fair project would require some additional electronics to handle the captured signal, but such a system could work.
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