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Module 1: Digital Lifestyles

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4.1 Overview of Digital Cameras

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Overview of Digital Cameras
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* [Show Transcript] OVERVIEW OF DIGITAL CAMERAS

A digital camera, unlike a traditional camera, does not use film to store
pictures. A digital camera stores each picture in a digital format on a
storage device, such as a flash memory card, located inside the camera.

Like a traditional camera, a digital camera has a dark box with a lens
that focuses light to create an image. However, unlike traditional cameras,
which focus the light on a piece of film, a digital camera focuses light on
a sensor. The sensor creates the image, which is then stored on the cameras
storage device.

You can transfer pictures taken with a digital camera to a computer. You
can use a USB cable to transfer pictures. You can then enhance the pictures
on the computer by using software, such as Windows Photo Gallery, which is
available with Windows Vista. For example, you can adjust the brightness,
change the background color, or even remove part of a picture.

Digital cameras make it possible for you to print pictures on demand by
using a digital photo printer. Although you need not buy film, you need to
pay for ink and special paper to print the pictures.

You can also share pictures taken using a digital camera with your friends
or relatives. You can send the pictures through e-mail or upload them to a
Web site. You can also add the pictures to electronic documents,
presentations, and newsletters.

Most digital cameras have a small screen that helps you see the pictures
immediately after you take them. Using this feature, you can view the
pictures without transferring them to a computer. You can choose the
pictures that you want to transfer and delete the remaining ones.

Digital cameras are classified based on various features, such as
resolution, size, and lens. Resolution or pixel depth is an important
feature of a digital camera. Resolution refers to the clarity and sharpness
of a picture.

Each picture is made up of small units called pixels. More pixels imply
better quality of pictures. Resolutions for digital cameras now range from
4 to 16 mega pixels. A mega pixel is 1 million pixels. However, as
technology advances, resolutions continue to change.

Digital cameras are also classified as compact, semiprofessional, and
professional cameras. Compact digital cameras are cheaper than
semiprofessional digital cameras, which in turn are cheaper than
professional digital cameras. Compact digital cameras have fixed lenses,
but semiprofessional and professional digital cameras have removable
lenses.

Compact digital cameras adjust settings, such as focus and exposure,
automatically and therefore make it easy for you to take pictures.
Semiprofessional digital cameras also adjust these settings automatically.
In addition, you can manually adjust settings as necessary. In professional
digital cameras, you can adjust settings only manually. These cameras have
lenses that focus faster and the ability to take a large number of higher
resolution pictures at high speed. GLOSSARY

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A

Add-in

A component that provides added functions by allowing the Web browser to
access and execute files that are included in Web pages.
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C

Camcorder

A digital video camera used to record video.

Compact disc (CD)

A storage device used to store data in a digital format.
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D

Digital camera

A camera that stores images digitally on a memory device, such as a flash
memory card or a mini hard disk.

Digital versatile disc (DVD)

A storage device used to store data in a digital format.
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E

Electronic mail (e-mail)

The exchange of text messages and computer files over the Internet.
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H

Home office

An arrangement that allows people to work from home.
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I

Internet

A worldwide collection of public networks that are linked to each other
for information exchange.

Intranet

A special type of network used to communicate and share information within
an organization.
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M

Mobile phone

A wireless device that has the capabilities of a traditional wired phone
and allows you to make a call from almost any location.

MPEG Audio Layer 3 (MP3)

A format developed by Motion Picture Expert Group to allow compression of
audio and video for digital distribution.
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N

Network

A group of computers and associated devices that are connected to share
resources and exchange information.
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P

Personal digital assistant (PDA)

A handheld computer that is used as a personal organizer. A traditional
PDA includes features such as an address book, task list, and a calculator.


Pixels

Refers to small units that make up a picture. The higher the number of
pixels, the better the quality of the picture.
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R

Regional work centre

A remote office that is connected to the companys head office by either
the company's network or the Internet.

Resolution

Refers to the clarity and sharpness of a picture.
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S

Speech recognition

A technology that allows you to communicate with a computer by using only
your voice to enter data and to issue commands.

Speech synthesis

A technology that allows the computer to speak to you. In speech
synthesis, the computer communicates to you by converting text to digital
audio.
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T

Telecommuting

An arrangement that allows people to work from home or from a remote
office.
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U

Universal serial bus (USB) cable

A cable that helps you connect digital devices to a computer without
turning off the computer.
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W

Web site

A collection of one or more Web pages that are linked together and made
available through a Web server.

Wide Area Network (WAN)

A network that connects devices in geographically separated areas.

Windows audio wave (WAV)

An audio format developed by Microsoft. This format is used to store audio
files in a digital format.

Windows media audio (WMA)

An audio format developed by Microsoft. This format is used to store
digital audio files. Lesson 4 - INTRODUCTION TO DIGITAL
PHOTOGRAPHY 4.1 - OVERVIEW OF DIGITAL CAMERAS [15]



Links:
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[1] http://alison.com/#A
[2] http://alison.com/#C
[3] http://alison.com/#D
[4] http://alison.com/#E
[5] http://alison.com/#H
[6] http://alison.com/#I
[7] http://alison.com/#M
[8] http://alison.com/#N
[9] http://alison.com/#P
[10] http://alison.com/#R
[11] http://alison.com/#S
[12] http://alison.com/#T
[13] http://alison.com/#U
[14] http://alison.com/#W
[15]
http://alison.com/mod/scorm/player.php?a=307¤torg=eXeRM_Module54823c6301d2f92cb412&scoid=14666