ALL
ABOUT DIGITAL CAMERAS
Digital images and pixels
Digital
Photographs may look continuous just like a normal Photographs. But unlike a
normal image, a digital image is composed of millions of tiny squares called
‘Pixels’ the quality of a digital image is thereby measured in pixels. The
higher the volume of Mega pixels, the higher becomes the quality of the digital
image
Pixel Count
Pixel count of digital cameras in
use at present varies between 1 Million pixels (Mega Pixel) to around 14
Million (14 Mega Pixel / 14 MP)
A 3MP digital
camera is more than enough for the use of armatures. It gives excellent 4” x 6”
prints and good 5” x 7“ prints.
However, to
make larger prints, it is advisable to use a d MP or MP camera.
Optical Zoom & Digital
Zoom
 |
| Optical Zoom Camera |
 |
| Digital Zoom Camera |
Nowadays, most of the digital cameras consist of both
the optical zoom and the digital zoom.
Optical
zoom is very important for a digital camera, because optical zoom will give the
chance to short a high quality picture than digital zooming.
Optical
zoom means, the focal length of the camera can be changed buy moving the camera
lense physically, just as zooming a lense on a film camera.
In
a digital zooming camera, the lense can not be moved physically. It simply crops the image and then enlarge the cropped portion.
Where
the picture quality is considered, optical zooming cameras are better than
digital zooming cameras,
For
an amateurs use, a 4x optical zoom camera is adequate. But for professional
photography, it would worth to go for a more powerful camera (eg 10 x optical
zoom)
Sensitivity and white balance
When
choosing a film for a film camera , it is important to consider its ISO rating
(eg ISO 100, ISO 200, ISO 400) similarly, when buying a digital camera it is
wise to consider its sensitivity settings. Because, the sensitivity setting in
a digital camera is introduced as a similar technology as ISO rating for film
cameras.
Also,
the ability of white balance should be considered as a very important feature,
when buying a digital camera. The white balance technology in a digital camera,
adjusts the camera setting according to the source of light used for shooting
pictures. (eg Sunlight, Fluorescent light, Filament Light).Therefore, it gives
a better quality picture.
Memory
In digital cameras, “Memory Cards” are used to sore
the shooted pictures and video clips,
A
main future of memory card is the reusability. When the stored pictures are
deleted, the memory card can be used again to restore new pictures.
The Number of
photos which can be stored and the video time period depends on the capacity of
the memory card. (eg. 16 MB, 32 MB. 128 MB, 256 MB, 512 MB etc..)
If you need to
video from your camera, the capacity of the memory card should be at least 256
MB.
When the
capacity of the memory card becomes higher, so does its price. Therefore it is
wise to select a memory card which is just sufficient for your needs.
Digital cameras
consists of several types of memory cards:
1.
Compact Flash (CF)
2.
Multi Media
3.
Secure Digital (SD)
4.
Memory Stick
5.
Smart Media
Among the
mentioned several types, memory sticks are conventional for digital cameras of
“SONY” brand.
When buying a digital
camera and we hope that this knowledge
will help you to select a better quality camera to suit your needs.
