21 Sep 08 Terminology - Digital Cameras
Author: Sinta Makah
It helps when learning to use your new digital camera to also know what some of the more common terms mean. Below you will find many of these common terms defined..
Automatic Mode — A setting that sets the focus, exposure and white-balance automatically.
Burst Mode or Continuous Capture Mode — a series of pictures taken one after another at quickly timed intervals with one press of the shutter button.
Compression — The process of compacting digital data, images and text by deleting selected information.
Digital Zoom — Cropping and magnifying the center part of an image.
JPEG — The predominant format used for image compression in digital cameras
Lag Time — The pause between the time the shutter button is pressed and when the camera actually captures the image
LCD — (Liquid-Crystal Display) is a small screen on a digital camera for viewing images.
Lens — A circular and transparent glass or plastic piece that has the function of collecting light and focusing it on the sensor to capture the image.
Megabyte — (MB) Measures 1024 Kilobytes, and refers to the amount of information in a file, or how much information can
be contained on a Memory Card, Hard Drive or Disk.
Pixels — Tiny units of color that make up digital pictures. Pixels also measure digital resolution. One million pixels
adds up to one mega-pixel.
RGB — Refers to Red, Green, Blue colors used on computers to create all other colors.
Resolution — Camera resolution describes the number of pixels used to create the image, which determines the amount of
detail a camera can capture. The more pixels a camera has, the more detail it can register and the larger the picture can be
printed.
Storage Card — The removable storage device which holds images taken with the camera, comparable to film, but much smaller. Also called a digital camera memory card…
Viewfinder — The optical “window” to look through to compose the scene.
White Balance — White balancing adjusts the camera to compensate for the type of light (daylight, fluorescent, incandescent, etc.,) or lighting conditions in the scene so it will look normal to the human eye.
Related posts
Tags: automatic mode, camera memory card, camera resolution, digital cam, Digital Camera, digital camera memory, digital camera memory card, Digital cameras, digital resolution, digital zoom, film, image compression, image jpeg, images, liquid crystal display, memory, memory card, new digital camera, optical window, picture, pictures, pixel, removable storage device, resolution, resolution camera, storage, storage card, viewfinder, white balance, zoom
21 Sep 08 Why Should you Switch Over to a Digital Camera?
Author: Roberto Sedycias
We have entered the age of digital cameras. The advantages of the traditional film camera over the digital camera have disappeared, and the former are increasingly becoming a part of our normal lives.
A digital camera produces digital pictures - these are so easy to load on a computer and they can be emailed across the world to your friends or relatives in a matter of minutes. It is easy to check digital pictures and delete them if you wish. If you find that a picture you have taken is useless, you can delete it easily instead of wasting film, which you cannot reuse. A film can go bad over time; so keeping a digital camera handy for use whenever necessary is a fine option.
One can characterize digital cameras by the image size. Digital pictures are made up of color dots called pixels. The pixels are expressed by height and width, for example 320 x 480. These numbers are then multiplied, providing the total amount of pixels. Large number of pixels provides more detailed images, but this resource is available mostly on the more expensive cameras. Two megapixels, which means 2 million pixels, is at the low end, and may result in defects when the picture is enlarged. On the other hand, seven megapixels represent a robust picture and can handle enlargement well.
One other point to consider is zooming. The Optical zoom feature adjusts the light which enters the camera, and this makes the scene to appear closer. The digital zoom feature adjusts the picture after being digitized, to produce a closer appearance. Both can produce the desired result, but optical zoom is preferable.
Digital cameras also come with internal storage, but this is usually too small. So you have to look at the kind of add on storage that the camera allows. The additional storage usually comes in the shape of a thumbnail sized chip, and you can carry these around conveniently if needed.
The battery is another area you have to consider. Some digital cameras use standard sized batteries, while others use less common, proprietary sizes. Some batteries hold a charge better; some battery systems are rechargeable, while some cameras just hog power.
Then there is the preview screen - which is an LCD (liquid crystal display) screen, which shows you what the camera would see at any given point if you wish to take a picture. In this system, the screen is active whenever you are preparing to take a picture, but this will also consume the battery while you are doing it.
But you also have digital cameras that come with an optical viewfinder that does not consume power. This is helpful when you are waiting for the right moment to shoot, or when you require the preview screen to compose a picture at a difficult angle. You can also preview the saved picture on the screen and delete the ones you don`t want to keep, and thus clear storage space.
With the ever changing and advancements in the technology these cameras also keep getting better and better. The basic features are common for all types of digital cameras, only the add on features keep varying with the price and the manufacturers choices. Usually they allow you to take pictures automatically, i.e. you can take your own picture, adjust the picture that you have taken may also adjust the settings according to the color choice, brightness, etc. You may also create your own video album!!
Thus it is apparent that the digital camera rules over the traditional cameras. There can`t be any competition between the two because without doubt digital cameras dominate the scene. They have effectively changed the way the world takes pictures and possessing a digital camera is a dream for many budding photographers.
Related posts
Tags: batteries, Battery, digital cam, Digital Camera, Digital cameras, digital zoom, film, film camera, image size, images, internal storage, liquid crystal display, megapix, megapixel, megapixels, optical viewfinder, optical zoom, photo, photograph, photographer, photographers, picture, pictures, pixel, storage, traditional camera, traditional cameras, traditional film camera, viewfinder, zoom
21 Sep 08 Digital Camera - the Easy Way to Take Pictures
Author: Roberto Sedycias
In comparison to film cameras, digital cameras have number of advantages which includes displaying the image on the camera screen right after recording, a single small memory device can record thousands of images, records video with sound, provision to edit images, and above all storage capacity can be re-used by deleting the images. There are numbers of devices available that has in-built digital cameras like mobile phones, PDA`s etc. Specialized digital cameras are fit into astronomical devices like The Hubble Space Telescope.
Digitizing images on scanner and digitizing video signals are much older than making of still images using digital signals from an array of discrete sensor elements. It was then used for astronauts to provide onboard navigation information during their visit to planets. It provided the still photos of stars and planet locations during transit and also additional stadiametric information for orbiting or landing guidance while approaching planet.
Steven Sasson, an engineer at Eastman Kodak, attempted to develop first digital camera with solid state CCD image sensor chips. But it was just a technical exercise. The true digital camera was Fuji DS-1P developed in 1988. And the first commercialized camera was Dycam Model 1 in 1990. Then in 1991, Kodak launched its Kodak DCS 100. Else Casio QV-10 was the first consumer camera in 1995. Nikon D1, a 2.74 megapixel camera was the first digital SLR developed in 1999. And in 2003, Canon 300D, first 600 megapixel camera was launched.
There are various types of digital cameras available. For videos, there are professional video cameras which are used in television and movie production. Camcorders come with inbuilt microphone and a small liquid crystal display to watch video while recording and playback. One can get still photographs also with them. Webcams, attached to computers, can capture full-motion video and are also available with microphones or zooming ability.
In live-preview digital camera, there is an electronic camera that can be used to frame and preview before taking the photograph and also to review stored photographs. Many of such cameras can take motion pictures. Then the recorded images can be transferred to computer, printer or any other such device. USB mass storage device enables the camera to function as disk drive for computer and Picture Transfer Protocol is then used.
To use Firewire, storage device is removed from camera and inserted into other device. Compact digital cameras, small and portable with inbuilt flash, are easy to use, and images are stored using Lossy compression. They might be able to capture motion picture but that to a limit. Bridge or SLR like camera is higher-end-live-preview camera with more advanced features like superzoom lenses, takes movies with sound, etc. Digital rangefinder, a user operated mechanism, is capable to measure subject distance.
Apart from above mentioned digital cameras, there are other categories also. Professional modular digital camera systems are used in studios for commercial production. Line-scan camera systems, based on focusing mechanism, are used in industrial settings to capture images of constantly moving materials. They capture images at extremely fast with high image resolutions.
Most of the digital cameras come with pre-set modes for different applications. Data can be transferred through USB port, Firewire port, USB PTP mode and even through wireless connections like WiFi, Bluetooth etc. These data are mostly stored in Microdrives, Joint Photography Experts Group (JPEG), Tagged Image File Format (TIFF) and RAW. Formats for movies are AVI, DV, MPEG and MOV. Recently MP4 format is also developed. Digital cameras have small but powerful batteries to operate for enough length of time.
Related posts
Tags: astronomical devices, batteries, Canon, canon 300d, Casio, CCD, ccd image sensor, compact digital, compact digital camera, compact digital cameras, digital cam, Digital Camera, Digital cameras, digital signals, digital slr, Eastman Kodak, film, film camera, film cameras, flash, Fuji, fuji ds, hubble space telescope, image resolution, image sensor, images, kodak, lense, lenses, liquid crystal display, megapix, megapixel, megapixel camera, memory, memory device, microphone, microphones, nikon, photo, photograph, photographs, photography, photos, picture, pictures, pixel, professional video cameras, resolution, resolutions, sensor chip, sensor chips, sensor element, sensor elements, still photos, storage, storage capacity, usb mass storage, usb mass storage device, video cameras, video signals, video with sound, zoom
