Main Concept And Evolution
When digital
cameras became common, a question many photographers asked was whether
their film cameras could be converted to digital. The first recorded
attempt at building a digital camera was by Steven Sasson, an engineer
at Eastman Kodak. The first true digital camera that recorded images as a
computerized file was likely the Fuji DS-1P of 1988, which recorded to a
16 MB internal memory card that used a battery to keep the data in
memory.
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.
A
digital camera is a camera that takes video or still photographs, or
both, digitally by recording images on a light-sensitive sensor. 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 resolution of a digital camera is often limited by the
camera sensor (typically a CCD or CMOS sensor chip) that turns light
into discrete signals, replacing the job of film in traditional
photography.
Digital cameras have high power requirements, and
over time have become increasingly smaller in size, which has resulted
in an ongoing need to develop a battery small enough to fit in the
camera and yet able to power it for a reasonable length of time. Digital
cameras are incorporated into many devices ranging from PDAs and mobile
phones (called camera phones) to vehicles and even webcams. Webcams are
digital cameras attached to computers, used for video conferencing or
other purposes.
When You Buy Digital Camera
Measuring
the "pixels per dollar" as a basic measure of value for a digital
camera, there has been a continuous and steady increase in the number of
pixels each dollar buys in a new camera consistent with the principles
of Before you buy a digital camera, it is important to determine what
kind of pictures you want to take with it. Be sure to check first its
capacity to produce high quality photo images and don't forget about
camera's batteries - make sure they are rechargeable.
When you buy
a digital camera, sometimes the spending does not end there. For
instance you may want to buy additional memory if the one that is
already included doesn't suit your need and its capacity is not enough
for you. This is why you must make sure that the gadget that you buy has
not only a "built-in" memory or a card slot for external and additional
memory, but also includes memory card with good enough capacity.
The LCD
is a special consideration you have to look into when you buy a digital
camera. This is a small screen located at the back of a digital camera
that allows you to preview the pictures you took. This has to be
considered because it uses up a lot of battery power.
It is
essential for you to feel comfortable holding your digital camera while
shooting. So, before you buy, the right thing will be to test and check
if you are comfortable holding it and using it. Special features that
will suit your needs should be thought about, too before you buy digital
camera. No matter what your needs and wants are for the device, your
financial resource will play a huge part in dictating the type of
digital camera you will buy. When buying in online store, make sure you
already know what you want and start sorting by lowest price first and
later calculating shipping and sales tax.
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