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Main > Electronics > Gadgets

How Digital Cameras Work
by Tracy V. Wilson and K. Nice and G. Gurevich

Shop for Digital Cameras

Table of Contents

 
 

A Nikon digital camera
In the past twenty years, most of the major technological breakthroughs in consumer electronics have really been part of one larger breakthrough. When you get down to it, CDs, DVDs, HDTV, MP3s and DVRs are all built around the same basic process: converting conventional analog information (represented by a fluctuating wave) into digital information (represented by ones and zeros, or bits). This fundamental shift in technology totally changed how we handle visual and audio information -- it completely redefined what is possible.

The digital camera is one of the most remarkable instances of this shift because it is so truly different from its predecessor. Conventional cameras depend entirely on chemical and mechanical processes -- you don't even need electricity to operate them. On the other hand, all digital cameras have a built-in computer, and all of them record images electronically.

The new approach has been enormously successful. Since film still provides better picture quality, digital cameras have not completely replaced conventional cameras. But, as digital imaging technology has improved, digital cameras have rapidly become more popular.

In this article, we'll find out exactly what's going on inside these amazing digital-age devices.

Shopping for a digital camera?
Not sure what to get? For most people, a standard 4-megapixel, $300 point-and-shoot camera is the best option. Check out the StuffGuide.com digital camera buying guide for more information.

 

Tiny, But Powerful
Ultracompact digital cameras are as small as a deck of cards, but most have 2 inch screens and take great snapshots. Click here to compare the best prices.

Top Selling Digital Cameras
Canon PowerShot A620 Digital Camera
7.4 Megapixel, 4x Optical Zoom, Standard Point and Shoot, Video Capability Included, 4 in. LCD Panel, MMC Card, SD Card, Built-In ...
$276 - $400

from 33 stores
Canon PowerShot A610 Digital Camera
5.3 Megapixel, 4x Optical Zoom, Standard Point and Shoot, Video Capability Included, 2 in. LCD Panel, MMC Card, SD Card, Built-In ...
$212 - $356

from 26 stores
Canon PowerShot SD550 / IXUS 750 Digital Camera
7.4 Megapixel, 3x Optical Zoom, Compact, Video Capability Included, 2.5 in. LCD Panel, MMC Card, SD Card, Built-In Flash
$325 - $445

from 36 stores

 
 
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Table of Contents:
›  Introduction to How Digital Cameras Work
›  Understanding the Basics
›  A Filmless Camera
›  Resolution
›  Capturing Color
›  More on Capturing Color
›  Exposure and Focus
›  Storage
›  Summary
›  Lots More Information
›  Compare Prices for Digital Cameras


 

 


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