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Main > Electronics > Gadgets

How Digital Cameras Work
by Karim Nice and Gerald Jay Gurevich



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 gradually fluctuating wave) into digital information (represented by 1s and 0s, 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 one. All digital cameras have a built-in computer, and all of them record images in an entirely electronic form.

The new approach has proved monstrously successful. It may be decades before digital cameras completely replace film cameras, if they ever do, but they will probably account for around half of the U.S. market within the next few years.

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

Lowest Price
1.Canon PowerShot A80 Digital Camera $310.00
2.Canon PowerShot S400 Digital Camera $318.95
3.Olympus Camedia C-750 Ultra Zoom Digital Camera $391.85
4.Fuji Finepix S5000 Digital Camera $285.00
5.Canon PowerShot G5 Digital Camera $436.95

 
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Table of Contents:
› Introduction to How Digital Cameras Work
Understanding the Basics
A Filmless Camera
Image Sensors: CCD vs. CMOS
Resolution
Capturing Color
Digitizing Information
Output, Storage and Compression
Aperture and Shutter Speed
Lens and Focal Length
Summary
When You Shop
Lots More Information


  

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