Information On How Your Digital Camera Works

Basically, a digital camera records electronic images by focusing light through a series of lenses onto a sensor. The images are stored as binary digital data on fixed or removable devices, which can later be read by a computer. This is an extremely simplified explanation; the process is a bit more complicated, but a lot more interesting!

High Optical Zoom Digital Camera

Most digital cameras have an image sensor called a charge coupled device (CCD). A few digital cameras have a complimentary sensor metal oxide semiconductor (CMOS) instead. Both of these devices convert light into electrical charges and both facilitate storage.

High Optical Zoom Digital Camera

The sensors are also used to filter light into the three basic primary colors and then recombine them to get a full spectrum. The more expensive the digital camera, the more sophisticated the process and the better the color quality. Three sensors will each filter a different color.

The shutter speed and aperture control the amount of light that reaches the sensor. The shutter speed is set automatically on most digital cameras, while the aperture can be either automatic or manually controllable. Most of us are grateful for the automatic settings, but photographers and serious hobbyists appreciate the aperture flexibility.

There are different types of lenses that digital cameras use: fixed-focus, fixed-zoom, digital-zoom, optical zoom lenses and replaceable lens systems. You will usually find fixed-focus and fixed- zoom lenses in inexpensive digital cameras. Optical-zoom lenses, with both wide and telephoto lenses, are usually found in more sophisticated, expensive cameras. A digital zoom is a process whereby pixels are actually "chosen" from the central part of the frame and enlarged. This feature can cut out unnecessary background, but it can also result in a less-focused, fuzzier image.

You can see your pictures on an LCD viewing screen on the back of your digital camera. This is only suitable for a quick check of picture quality (was everyone smiling?), not for really appreciating the photo. The number of megapixels (MP) in your digital camera determines the resolution -- the higher the number, the better the photo clarity!

Knowing your megapixels gives you an excellent idea of the quality of printed pictures at a given size. A 1MP digital camera will give you pictures that are perfectly suitable for web viewing or emailing. These pictures are easy to download and are of decent clarity and resolution online. The photos taken with a 2MP digital camera will generate quality, high resolution, 4x5 inch prints. Larger prints require an even larger MP number.

A great digital camera advancement is the way data is stored. Early digital cameras held all images on internal memory devices. These digital cameras were not capable of much storage and transferring to a computer was a cumbersome process. Today's digital cameras use reusable and removable storage. Memory sticks, CompactFlash and SmartMedia cards add lots of extra storage space and make downloading a snap. Other devices such as writeable CDs and DVDs, hard disks, floppy disks and microdrives have given consumers lots of options for storing images, with lots of room available!

Information On How Your Digital Camera Works

High Optical Zoom Digital Camera

Special Price!!! Canon PowerShot ELPH 100 HS 12 MP CMOS Digital Camera with 4X Optical Zoom (Blue)

Nov 07, 2011 00:58:12

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Canon PowerShot ELPH 100 HS 12 MP CMOS Digital Camera with 4X Optical Zoom (Blue) Feature

• 12.1 effective megapixels, 1/2.3-inch CMOS image sensor; 4x wide optical zoom and 4x digital zoom
• 3.0 in. Pure Color LCD with wide viewing angle; Built-in flash with Red-Eye Correction; Full 1080p HD video with Dynamic IS
• Optical Image Stabilizer; DIGIC 4 Image Processor;
• Smart AUTO (32 scenes); New Scene Modes: Toy Camera Effect amd Monochrome
• USB 2.0 Hi-Speed; SD card slot (card not included)
• Canon's HS SYSTEM with a 12.1 MP CMOS and DIGIC 4 Image Processor improves shooting in low-light situations without the need for a flash and
• Full 1080p HD Video for exceptional quality and keep footage stabilized with Dynamic IS.
• Get high-speed shooting in a point-and-shoot camera: High-speed Burst Mode captures 8.2fps and
• Smart AUTO intelligently selects the proper settings for the camera based on 32 predefined shooting situations.
• 4x Optical Zoom with a Wide-Angle lens (28-112mm) Optical Image Stabilizer and a 3.0-inch PureColor System LCD.
• Super Slow Motion Movie records video at high speeds to allow slow motion playback.
• Lowers noise levels at higher ISO settings.

Canon PowerShot ELPH 100 HS 12 MP CMOS Digital Camera with 4X Optical Zoom (Blue) Overview

Canon's 4925B001 PowerShot ELPH 100 HS Blue 12MP Digital Camera with 4x Wide Zoom and 3.0 In. LCD Display is what you need to add that creative edge. Canon's HS SYSTEM takes the frustration out of low light shooting. The system delivers clear, blur-free shots with the ambiance intact, and frees you from the sometimes unwanted effects of using the flash. Beautiful low light shots are possible at both low and high ISO speeds, and the dynamic range is expanded to retain maximum detail in highlight and shadow areas. It features Full 1080p HD video for exceptional quality and keeps footage stabilized with Dynamic IS.

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