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What are Digital Cameras?

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A digital camera is a camera that takes video or still photographs, or both, digitally by recording images on a light-sensitive sensor.

Many compact digital still cameras can record sound and moving video as well as still photographs. In the Western market, digital cameras outsell their 35 mm film counterparts.

Digital cameras can include features that are not found in film cameras, such as displaying an image on the camera's screen immediately after it is recorded, the capacity to take thousands of images on a single small memory device, the ability to record video with sound, the ability to edit images, and deletion of images allowing re-use of the storage they occupied. Digital cameras are incorporated into many devices ranging from PDAs and mobile phones (called camera phones) to vehicles. The Hubble Space Telescope and other astronomical devices are essentially specialised digital cameras.



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Videos about Digital Cameras 

All about digital cameras ...

Watch these awesome videos of various Digital Cameras to become better informed!


How to Get the Best Digital Camera

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Digital Camera Bait & Switch

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Canon Digital Camera (SLR): Rebel XTi

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Samsung NV11 Digital Camera

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Panasonic DMC-FZ8 Digital Camera

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Sony Cyber-Shot DSC-W90 Digital Camera

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Olympus Evolt E410 10MP Digital Camera

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Kodak Easyshare Z712 Refurbished Digital Camera

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Pentax Optio W30 Waterproof Digital Camera

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Canon Digital Camera Accessories 

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JumpStart Video Training Guide on DVD, for the Canon Digital Rebel XT Camera.

JumpStart Video Training Guide on DVD, for the Canon Digital Rebel XT Camera.

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Pro Power aftermarket, new, compatible Canon CG-300 Wall & Car Battery Charger for BP-208 battery.

Pro Power aftermarket, new, compatible Canon CG-300 Wall & Car Battery Charger for BP-208 battery.

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DIG CAM BATTERY FOR CANON

DIG CAM BATTERY FOR CANON

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Ikelite Underwater Camera Housing for the Canon Powershot S5 IS Digital Cameras

Ikelite Underwater Camera Housing for the Canon Powershot S5 IS Digital Cameras

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8 AA NiMH Rechargeable Batteries - Ready to use right out of the package - Holds charge 4 Times longer than standard nimh & made for use with CANON PowerShot A650 A720 SX100 A560 A570 IS A610 A620 A630 A640 A700 A710 IS S1 IS S2 IS S3 IS Digital Camera

8 AA NiMH Rechargeable Batteries - Ready to use right out of the package - Holds charge 4 Times longer than standard nimh & made for use with CANON PowerShot A650 A720 SX100 A560 A570 IS A610 A620 A630 A640 A700 A710 IS S1 IS S2 IS S3 IS Digital Camera

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FINEPIX F20/F30 CAMERA CASE

FINEPIX F20/F30 CAMERA CASE

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Digital SLR Camera Dedicated TTL Flash - Canon

Digital SLR Camera Dedicated TTL Flash - Canon

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Canon 30D Combo Pak Training DVD and inBrief laminated reference card

Canon 30D Combo Pak Training DVD and inBrief laminated reference card

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Giottos Aegis 55.5 x 46.7mm Professional Glass LCD Screen Protector for the Canon EOS-30D, 12 Layers of Multi-Coatings Each Side.

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Hitachi 4gb Digital Microdrive High Speed Memory Card

Hitachi 4gb Digital Microdrive High Speed Memory Card

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Canon 7.2v 10 watt Replacement Bulb for the VL-10Li Video Light.

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LumiQuest Ultra Image Plug-in Software for Photoshop 6.0 and Higher, with Canon 1D, D30, D60, 5000 and Other Digital Cameras, for Windows & Macintosh

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Ewa-marine UW Housing for Digital Cameras, fits Canon Powershot SD600, SD630, SD700, SD1000 Digital Elph Cameras & Ixus 55, 60, 65, 70, 75

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AC Power CA-560 CA560 Adapter replacement for Canon PowerShot G6 G5 G3, OPTURA ZR40 ZR50 Digital Cameras / Camcorders

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Canon GL2 MiniDV Digital Camcorder w/20x Optical Zoom

Canon GL2 MiniDV Digital Camcorder w/20x Optical Zoom

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Ikelite Underwater Camera Housing with E-TTL for the Canon Digital EOS 5D Camera, Clear Molded

Ikelite Underwater Camera Housing with E-TTL for the Canon Digital EOS 5D Camera, Clear Molded

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Ikelite Underwater SLR Camera Housing for Canon 30D Digital SLR

Ikelite Underwater SLR Camera Housing for Canon 30D Digital SLR

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Ballistic Nylon Camera Case for Canon A700 Digital Cameras, Accessories

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Digital Camera - CLASSIFICATION 

All about digital cameras ...

Video cameras

Video cameras are classified as devices whose main purpose is to record moving images.

* Professional video cameras such as those used in television and movie production. These typically have multiple image sensors (one per color) to enhance resolution and color gamut. Professional video cameras usually do not have a built-in VCR or microphone.
* Camcorders used by amateurs. They generally include a microphone to record sound, and feature a small liquid crystal display to watch the video during taping and playback.
* Webcams are digital cameras attached to computers, used for video conferencing or other purposes. Webcams can capture full-motion video as well, and some models include microphones or zoom ability.

In addition, many Live-Preview Digital cameras have a "movie" mode in which images are continuously acquired at a frame rate sufficient for video.

Live-preview digital cameras
Canon PowerShot A95 with CompactFlash card loaded

Main article: Live-preview digital camera

The term digital still camera (DSC) usually implies a live-preview digital camera, which uses an electronic screen, usually a rear-mounted liquid crystal display, as the principal means of framing and previewing before taking the photograph, and for viewing stored photographs. All use either a charge-coupled device (CCD) or a CMOS image sensor to sense the light intensities across the focal plane.

Many live-preview cameras have a movie mode, and many camcorders can take still photographs. However, still cameras take better still photographs than camcorders, and vice versa; there is still a need for distinct still and motion picture cameras.

Images may be transferred to a computer, printer or other device in a number of ways: the USB mass storage device class makes the camera appear to the computer as if it were a disk drive; the Picture Transfer Protocol (PTP) and its derivatives may be used; Firewire is sometimes supported; and the storage device may simply be removed from the camera and inserted into another device.

Live-preview cameras may be compact or subcompact, or the larger and more sophisticated bridge cameras.
Canon PowerShot A60

Compact digital cameras

Compact cameras are designed to be small and portable; the smallest are described as subcompacts. Compact cameras are usually designed to be easy to use, sacrificing advanced features and picture quality for compactness and simplicity; images can only be stored using lossy JPEG compression. Most have a built-in flash usually of low power, sufficient for nearby subjects. They may have limited motion picture capability. Compacts often have macro capability, but if they have zoom capability the range is usually less than for bridge and DSLR cameras. They have a greater depth of field, allowing objects within a large range of distances from the camera to be in sharp focus. They are particularly suitable for casual and "snapshot" use.

Bridge cameras

Main article: Bridge digital camera

Bridge or SLR-like cameras are higher-end live-preview cameras that physically resemble DSLRs and share with them some advanced features, but share with compacts the live-preview design and small sensor sizes.
Fujifilm FinePix S9000

Bridge cameras often have superzoom lenses which provide a very wide zoom range, typically 12:1, which is attained at the cost of some distortions, including barrel and pincushion distortion, to a degree which varies with lens quality. These cameras are sometimes marketed as and confused with digital SLR cameras since the appearance is similar. Bridge cameras lack the mirror and reflex system of DSLRs, have so far been fitted with fixed (non-interchangeable) lenses (although in some cases accessory wide-angle or telephoto converters can be attached to the lens), can usually take movies with sound, and the scene is composed by viewing either the liquid crystal display or the electronic viewfinder (EVF). They are usually slower to operate than a true digital SLR, but they are capable of very good image quality while being more compact and lighter than DSLRs. The high-end models of this type have comparable resolutions to low and mid-range DSLRs. Many of these cameras can store images in lossless RAW format as an option to lossy JPEG compression. The majority have a built-in flash, often a unit which flips up over the lens. The guide number tends to be between 11 and 15.

Digital single lens reflex cameras

Main article: Digital single-lens reflex cameras

Digital single-lens reflex cameras (DSLRs) are digital cameras based on film single-lens reflex cameras (SLRs), both types are characterized by the existence of a mirror and reflex system. See the main article on DSLRs for a detailed treatment of this category.

Digital rangefinders

Main article: Rangefinder camera

A rangefinder is a user-operated optical mechanism to measure subject distance once widely used on film cameras. Most digital cameras measure subject distance automatically using acoustic or electronic techniques, but it is not customary to say that they have a rangefinder. The term rangefinder alone is sometimes used to mean a rangefinder camera, that is, a film camera equipped with a rangefinder, as distinct from an SLR or a simple camera with no way to measure distance.

Information on digital rangefinder cameras specifically is here.

Professional modular digital camera systems

This category includes very high end professional equipment that can be assembled from modular components (winders, grips, lenses, etc.) to suit particular purposes. Common makes include Hasselblad and Mamiya. They were developed for medium or large format film sizes, as these captured greater detail and could be enlarged more than 35 mm.

Typically these cameras are used in studios for commercial production; being bulky and awkward to carry they are rarely used in action or nature photography. They can often be converted into either film or digital use by changing out the back part of the unit, hence the use of terms such as a "digital back" or "film back." These cameras are very expensive (up to $40,000) and are typically not seen in the hands of consumers.

Line-scan camera systems

A line-scan camera is a camera device containing a line-scan image sensor chip, and a focusing mechanism. These cameras are almost solely used in industrial settings to capture an image of a constant stream of moving material. Unlike video cameras, line-scan cameras use a single array of pixel sensors, instead of a matrix of them. Data coming from the line-scan camera has a frequency, where the camera scans a line, waits, and repeats. The data coming from the line-scan camera is commonly processed by a computer, to collect the one-dimensional line data and to create a two-dimensional image. The collected two-dimensional image data is then processed by image-processing methods for industrial purposes.

Line-scan technology is capable of capturing data extremely fast, and at very high image resolutions. Usually under these conditions, resulting collected image data can quickly exceed 100MB in a fraction of a second. Line-scan-camera-based integrated systems, therefore are usually designed to streamline the camera's output in order to meet the system's objective, using computer technology which is also affordable.

Line-scan cameras intended for the parcel handling industry can integrate adaptive focusing mechanisms to scan 6 sides of any rectangular parcel in focus, regardless of angle, and size. The resulting 2-D captured images could contain, but are not limited to: 1D and 2D barcodes, address information, and any pattern that can be processed via image processing methods. Since the images are 2-D, they are also human-readable and can be viewable on a computer screen. Advanced integrated systems include video coding and optical character recognition (OCR).



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Kodak EasyShare C713 7MP Digital Camera (Pink)

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Kodak EasyShare C713 7MP Digital Camera with 3x Optical Zoom

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Kodak Digital Camera Accessories 

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Deluxe Camera Case

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Euro Collection Medium Oval Zip Top Camera Bag

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Kodak EasyShare Z650 6MP Digital Camera with 10x Optical Zoom and EasyShare Printer Dock (Series 3)

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Kodak XD Card 256 MB KPXD256SCS

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Kodak KLIC-7002 Equivalent Digital Camera Battery

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Kodak EasyShare C310 4MP Digital Camera with Kodak EasyShare Printer Dock

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Kodak Compact Flash Card 256 MB KPCF256SCS (Retail Package)

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Small Camera Case

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Lenmar DLK7003 Lithium-ion Digital Camera/Camcorder Battery Equivelent to the Kodak KLIC-7003 Battery

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