Flip UltraHD Camcorder

The World’s Simplest HD Camcorder
The Flip UltraHD camcorder combines Flip Video’s signature shoot-and-share simplicity with the power of vivid, vibrant HD video. UltraHD could not be easier to use: just power on and press record, and you’ll be capturing high-quality HD video in seconds.

When its time to share your video, use the flip-out USB arm to connect to any PC or Mac and launch built-in FlipShare editing and video-sharing software. Built-in FlipShare software lets you easily email videos, edit individual clips, make custom movies, capture still photos from video, and even upload video to sharing sites likeYouTube and MySpace.

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Canon EOS Rebel T1i 15.1 MP CMOS Digital SLR Camera

Canon’s new EOS Rebel T1i is packed with features, both refined and new. In addition to its admirable performance with an all-new 15.1 Megapixel Canon CMOS sensor, DIGIC 4 Image Processor, a 3.0-inch Clear View LCD with anti-reflective and scratch resistant coating, and compatibility with the EOS System of lenses and Speedlites, the EOS Rebel T1i adds remarkable Full HD video capture at resolutions up to 1920 x 1080.

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Canon Digital Rebel XSi 12.2 MP Digital SLR Camera

For stunning photography with point and shoot ease, look no further than Canon’s EOS Rebel XSi. The EOS Rebel XSi brings staggering technological innovation to the masses. It features Canon’s EOS Integrated Cleaning System, Live View Function, a powerful DIGIC III Image Processor, plus a new 12.2-megapixel CMOS sensor and is available in a kit with the new EF-S 18-55mm f/3.5-5.6 IS lens with Optical Image Stabilizer. The EOS Rebel XSi’s refined, ergonomic design includes a new 3.0-inch LCD monitor, compatibility with SD and SDHC memory cards and new accessories that enhance every aspect of the photographic experience.

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Canon PowerShot SX20IS 12.1MP Digital Camera

Discover the HD difference. With the classically stylish PowerShot SX20 IS, you can produce magnificent HD movies and dazzling photos. Loaded with features, it’s got a high-powered 20x wide-angle optical zoom with Optical Image Stabilizer, 12.1 megapixels, a big 2.5-inch Vari-Angle LCD, Blink Detection and more.

The PowerShot SX20 IS is equipped with many of the same features as a higher-end camera: an ultra-powerful zoom, eye-popping resolution and advanced picture-improving technology. 12.1 megapixels of resolution gives your photography incomparable depth and ensures that any section of any shot can be enlarged and cropped with no loss in quality when you edit the image even if you choose to print the image. It can create crisp, clear 13 x 19-inch posters.

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Disclosure

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.

DIGITAL CAMERA BASICS

Let’s say you want to take a picture and e-mail it to a friend. To do this, you need the image to be represented in the language that computers recognize — bits and bytes. Essentially, a digital image is just a long string of 1s and 0s that represent all the tiny colored dots — or pixels — that collectively make up the image. (For information on sampling and digital representations of data, see this explanation of the digitization of sound waves. Digitizing light waves works in a similar way.)

If you want to get a picture into this form, you have two options:

* You can take a photograph using a conventional film camera, process the film chemically, print it onto photographic paper and then use a digital scanner to sample the print (record the pattern of light as a series of pixel values).

* You can directly sample the original light that bounces off your subject, immediately breaking that light pattern down into a series of pixel values — in other words, you can use a digital camera.

At its most basic level, this is all there is to a digital camera. Just like a conventional camera, it has a series of lenses that focus light to create an image of a scene. But instead of focusing this light onto a piece of film, it focuses it onto a semiconductor device that records light electronically. A computer then breaks this electronic information down into digital data. All the fun and interesting features of digital cameras come as a direct result of this process.

Find out how the camera does all this.  Continue reading at How Stuff Works