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How
Does a Digital Camera Differ From a Standard Camera?
It Uses Silicon "Film"
How
Much Should I Expect To Pay?
Snapshot/Personal: Under $500
Business: $500 to $800
Hobby: $800 to $1,200
Professionals: $2,000 and Up
Which
Features Are Most Important?
Resolution: At Least 1 Megapixel
Get Zoom If You Can Afford It
Interface and Media: Get an External Card Reader
Opt for an Optical Viewfinder
Macro Mode
LCD Display
Out to TV
Optional or Interchangeable Lenses
What
Do I Need to Work With My Pictures?
Image-Editing Software
Printer
What
Are My Alternatives?
Videoconferencing Cameras
How
Should I Pay?
Always Use a Credit Card
Avoid Restocking Fees
How
Can I Choose A Reliable Brand?
Know Thy Warranty
Ask Other Buyers
How Does a Digital Camera Differ
From a Standard Camera?
It Uses Silicon "Film"
The defining difference between digital cameras
and those of the film variety is the medium used to record the
image. While a conventional camera uses film, digital cameras use
an array of digital image sensors. These image sensors may be of
the charged coupled device (CCD) or complementary metal-oxide
semiconductor (CMOS) varieties.
Digital and film cameras each have their
advantages. Film cameras cost much less than similarly equipped
digital cameras, and they let you fire one shot after another
without the processing delays demanded by most digital cameras.
Then again, digital cameras save you the hassles and delays of
film processing, providing immediate access to your images.
Unless you're highly skilled at image scanning and editing, even
an inexpensive digital camera will also likely give you better
image quality than a film camera and scanner when you need to
load images into your system.
How Much Should I Expect To Pay?
Snapshot/Personal: Under $500
If you want a basic, inexpensive camera that
delivers good image quality with a minimum of fuss, a camera in
this price range should do. It's possible to find digital cameras
selling for less than $250, but at this price expect top
resolutions of only 640x480 and only the most basic features.
Models above $300 or so typically provide built-in LCD panels and
resolutions of 1,024x768 or higher. A few also boast an
integrated zoom lens, but in general expect fairly little in the
way of advanced features at this price.
Business: $500 to $800
Today's midrange offerings often boast optical
resolutions of 1,280x1,024 or higher. These models also generally
boast 2x or 3x optical zoom lenses, automatic focus instead of
fixed focus, and at least some degree of manual control over
exposure and some other settings. Aim for this price point if you
want more flexibility than a basic point-and-shoot model can
offer but don't need a lot of advanced features or controls.
Hobby: $800 to $1,200
If terms such as aperture and shutter speed make
you smile instead of wince, you'll probably want a digital camera
that allows greater manual control than your average
point-and-shoot offering. Compared with more casual users,
hobbyists might also demand higher resolutions, high-quality
lenses, greater zoom factors, more program modes, more advanced
metering, and the ability to attach standard filters and external
flash equipment.
Professionals: $2,000 and Up
Digital cameras geared for professionals typically
offer the same mix-and-match hardware flexibility and extensive
controls that professional-class film cameras do. In fact, from a
professional's perspective, the best digital camera is
essentially a conventional camera body with a digital back
installed; these will cost you over $10,000, however. Resolutions
begin at about 2 million pixels.
Which Features Are Most Important?
Resolution: At Least 1 Megapixel
A resolution of 640x480 might be all you need if
you're only planning to use and view your images online, but
demand at least 1,024x768 pixels if you also want to print your
images at a fairly high quality. A resolution of 1,024x768 should
enable reasonably good 5x7-inch prints. Choose a model capable of
about 1,280x1,024 pixels for satisfactory quality at sizes as
large as 8x10 inches.
Some manufacturers identify their cameras by resolutions available only through interpolation. For the best results, make sure the camera you buy provides the resolution you need opticallythat its array of image sensors contains at least as many sensors as you need pixels. For instance, a camera with an optical resolution of 1,024x768 will provide at least 786,432 sensors. In practice the number should be at least 800,000, because most digital cameras use some of their sensors for metering and other purposes. Manufacturers use the term megapixel to denote the ability to capture about 1 million pixels of information.
Most digital cameras charge-couple device
(CCD) image sensors, but some cameras now use image sensors of
the complimentary metal-oxide semiconductor (CMOS) variety. Also
referred to by the acronym CIS (for CMOS image sensors), this
newer type of sensor is less expensive than its CCD counterpart
and requires less power, but CCD arrays generally yield better
image quality.
Get Zoom If You Can Afford It
Particularly if you'll often be photographing
people, you may want to make a point of choosing a camera with an
integral zoom lens. The fixed-focal-length lenses used by many
models should prove adequate for many landscape shots and family
group pictures. Then again, being able to "zoom" in for
a tighter shot can be a huge advantage, especially when shooting
candids or portraits. A 2x zoom lets you roughly double the size
of your subject in the captured shot, while a 3x zoom lets you
triple the size.
If you have your heart set on a zoom lens,
make sure you look for a model with an optical zoom. Many cameras
offer digital zoom in addition to or instead of a true zoom lens.
The difference, in brief: With an optical zoom, the camera
adjusts the lens to focus the tighter image over the entire image
sensor array, so that the camera captures the zoomed image at as
high a resolution as it can. With digital zoom, on the other
hand, the camera simply ignores data collected for all but the
intended, tighter image. In other words, when you zoom digitally,
you're essentially just cropping part of the image in-camera,
without increasing the resolution of the portion of the image you
really want to keep.
Interface and Media: Get an External Card Reader
To transfer images to your PC with most digital
cameras, you connect an included interface cable to your system's
nine-pin serial port. An increasing number of cameras are using a
USB interface either as a replacement to a serial-port interface
or as an additional interface. Either approach should work well
if your system has the appropriate port, but USB's advantages
make it a better choice over the long haul. These advantages
include faster transfer speeds, support for hot-plugging
components, and the ability to provide power to the component
through the interface. The FireWire interface should also be
available on an increasing number of cameras in time. This
interface offers roughly the same advantages as USB but allows
faster data transfers still.
What storage medium your camera uses may also determine how easily you can transfer images to your PC. The great majority of today's cameras accommodate tiny solid-state storage cards of the CompactFlash or SmartMedia variety. How much storage space you'll need depends partly on the resolution of the images you'll be capturing. Most of today's cameras come with 4MB or 8MB cards, but you can buy CompactFlash cards that hold as much of 96MB of information. Currently, SmartMedia cards are available in capacities as large as 16MB. Sony's Mavica cameras have won fans by storing images to standard 3.5-inch floppies. The obvious downside to this approach is the maximum 1.44MB capacity of each disk, though floppies certainly cost little enough to allow you to carry plenty of spares.
Adapters that allow a standard 3.5-inch drive to read SmartMedia cards are now widely available, and other adapters that plug into a parallel port or a PC Card slot can read CompactFlash or SmartMedia cards. These card readers are the fastest, most efficient, and most convenient way to transfer files from the camera to your system.
Opt for an Optical Viewfinder
The LCD panels provided on the majority of digital
cameras can be used to frame your shots, but most buyers should
make a point of opting for a camera that also provides a
traditional optical viewfinder. Using the LCD panel as a
viewfinder will often let you frame your shots more
preciselyoptical viewfinders usually do not show exactly
how much of the scene will be capturedbut constantly
running the LCD panel will also greatly increase your camera's
appetite for batteries. Particularly on aggressively priced
units, LCD panels often update slow enough to be awkward to use
with fast-moving subjects. Another problem: Direct sunlight can
wash out the LCD panels of many cameras, making them difficult to
use at best.
Macro Mode
In photography parlance, true macro functionality
indicates that a subject can be captured at its actual size,
which implies the ability to focus at distances of mere inches.
Only a precious few professional lenses actually deliver true,
1-to-1 macro capability, but the term macro has come to denote
just about any close-focusing ability. Most digital cameras
provide a macro setting to let you get up close and personal
without losing focus.
LCD Display
Most of today's digital cameras include a small
integrated LCD panel, which most often measure 1.8 inches
diagonally. Some models depend on these LCD panels as their
primary viewfinders, but the LCD panels probably more often prove
useful for other purposes. For instance, the ability to view the
image you just captured can be a real help. An LCD panel also
comes in handy for image management and camera control: With
well-designed controls, the built-in display makes it easy to
change your camera's settings and to view and manage stored
images.
Out to TV
If you want the ability to show off your images to
family and friends using a television or other video device,
insist on a digital camera that supports TV hookup. (Most do.)
Connecting to a television is easy and requires only an
RCA-style, composite connector on the TV end. Many cameras let
you choose to control the show manually or have the camera cycle
through the stored images automatically. TV-out capability can
also give you a way to view and show the panoramas and short
videos that some cameras let you create. With some cameras, you
can load images back into your camera after annotating and
editing them on your PC, so that you can use the camera to give
more elaborate presentations than would otherwise be possible.
Keep in mind that the TV-out feature outputs a standard video
signal, so you could also use it to copy presentations to
videotape or to output to a video projector.
Optional or Interchangeable Lenses
Like low-cost conventional cameras, most digital
cameras come with integrated lenses rather than using removable
lenses. For the time being, at least, you'll have to shell out
the cash for a professional-class camera if you want a digital
model that uses a standard lens mount. Some sub-$1,000 models
accept proprietary add-ons such as fisheye and telephoto
adapters.
Back to Top
What Do I Need to Work With My
Pictures?
Image-Editing Software
It's probably safe to assume that any digital
camera you buy will come with software that lets you touch up
your images. Most come with a basic image-transfer and -editing
utility plus a separate novice-oriented image-editing package,
such as Adobe PhotoDeluxe or Microsoft PictureIt. Such packages
lack the power and flexibility of Adobe Photoshop and other
veteran image-editing packages, but most casual users would never
come close to using the full power of Photoshop.
Printer
You should have no problem finding an affordable
printer that can output creditable color prints. Color inkjet
printers can do an excellent job with both photorealistic prints
and workaday text documents, making them a sensible choice for
many buyers. In most cases, it probably makes good sense to print
images from your image-editing software, which should be
well-equipped to help you tweak image quality and set print size
and characteristics. Some camera manufacturers also sell printers
that can print directly from the company's cameras or from
CompactFlash or SmartMedia memory cards, without the aid of an
attached PC.
What Are My Alternatives?
Videoconferencing Cameras
A tethered camera might do the trick if you only
want to capture the occasional rude gesture for friendly e-mails,
or if you dream of tapping into the wonderful world of
videoconferencing. Often referred to as videoconferencing or
eyeball cameras, these small desktop cameras typically cost
between $80 and $130, depending on resolution and other features.
As still cameras, many can manage a resolution of 640x480, though
resolution when handling motion-video chores is usually 320x240
or less. These cameras lack any stand-alone capability, so their
usefulness as still cameras is limited even if you can live with
their relatively low resolution.
How Should I Pay?
Always Use a Credit Card
You don't forfeit your rights as a consumer if you
pay by check, money order, check card, or debit card, but you
forfeit the most practical way to enforce those
rightscredit-card companies' cloutif there's a
problem with the product or its delivery. Under the Fair Credit
Billing Act, you have 60 days from the occurrence of the problem
in which to report the details in writing. No credit-card company
guarantees it will solve every problem or issue a chargeback for
every disputed purchase, but the power of the creditor is often
the heaviest weapon you can wield. Many debit cards now limit
your liability to $50 in the event of fraud, but the money is
already out of your checking account. It's the same with checks
and even worse with money ordersthey're the equivalent of
cash.
Avoid Restocking Fees
It's the sometimes shocking reason you should
always read the fine print: Restocking feesoften 15 to 20
percent of your total purchase pricecan take a big bite out
of a money-back return policy. Be sure to ask about the existence
and terms of any restocking policies before you buy. Often,
different restocking fees apply to different types of products or
even to different parts of a system purchase. PC hardware, for
instance, might be returnable without a restocking fee, but
bundled software may be subject to a fee or nonreturnable once
opened.
Back to Top
How Can I Choose A Reliable Brand?
Know Thy Warranty
All things being equal, a three-year warranty is
obviously more attractive than a one-year warranty. But
sometimes, a solid one-year planone that covers parts and
labor on all components, not just somecan be better than
three years of haggling and headaches. Ask questions like: Must
you install replacement parts yourself? Who pays for return
shipping for major repairs? Is a loaner unit available during
downtime?
Ask Other Buyers
Advice from trusted colleagues is always a good
recourse, as long as you keep in mind that a single person's
experience with a company doesn't guarantee that yours will be
the same.
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