A digital camera is a camera that takes digital photographs on a light-sensitive sensor. Many digital cameras can also record sound and videos besides still photographs. These cameras can store thousands of images on a small memory space. The users can also edit the stored images. They can also delete the stored images. Deletion of stored images will free the device's memory which can then again be used for taking more photographs.
The digital cameras now-a-days are being incorporated into devices like mobile phones & personal digital assistants (PDAs) and vehicles. There are various types of digital cameras like video cameras, line-scan cameras, bridge cameras and live-preview cameras. The video cameras are further classified as camcorders, professional video cameras and web-cams. While a web-cam is attached to computers for video conference purposes, a camcorder is meant for the use of amateur photographers.
A Bridge camera often has a super-zoom camera lens that provides a very wide zoom range. These cameras are often confused with digital SLR cameras as their appearance is similar to each other. Many of the Bridge cameras store images inloss-less RAW format. They are generally lighter that DSLR cameras and provide images of good quality. Most of the compact digital cameras store images in Tagged Image File Format (TIFF) and Joint Photography Experts Group (JPEG) file formats. Some cameras also use formats like Design Rule for Camera Format (DCF), Digital Print Order Format (DPOF) and Exchangeable Image File Format (Exif).
Zoom are designated as 3x, 4x, 5x etc. These designations refer to the ratio between the longest and shortest focal lengths. A larger zoom designation does not necessarily mean that the image cannot be magnified any more. A zoom lens is one wherein a photographer can vary the focal length of the camera lens within a predefined range. The zoom lens allows users to achieve a variety of perspectives and compositions. These zoom lenses come handy when the user has to capture images of a dynamic subject matter like an athletics event.
Digital Camera Video Capture
All of us have mistakenly capture motion in a digital photo. In most cases the result was not what we wanted a burry useless digital photo. Learning to control such blurriness is the exact skill you will need in order to capture digital photos that are of high quality but also capture the feeling of a moving object.
The main technique for capturing a moving object is controlling the shutter speed. We all know by experience that when the shutter speed is too slow and the objects in the photo are moving the digital photo ends up being blurry. Or when taking digital photos of a sport event with fast moving object the shutter speed should be set to high in order to achieve crisp sharp photos.
When you want to capture the feeling of movement in a digital photo you can take advantage of the control over the shutter speed. Setting the shutter speed to the right value will result in a digital photo that is just a bit blurry to convey the movement but is still sharp enough to be useful and of high quality.
Another important factor when taking digital photos that capture movement is the fact that while the object is moving the background is not. This can help further convey the feeling of motion by either blurring just the moving object or just the background. For example assume that you need to take a digital photo of a runner. You want the digital photo to convey the fact that the runner is moving or in other words you want the viewer to immediately realize that he is looking at a digital photo of a runner while running.
There are two options to achieve just that. One is to blur the runner. Set the Digltal SLR shutter speed to the right value that will blur the runner just a bit. Hold the camera steady preferably on a tripod to make sure that the camera does not move and the background is still and sharp. The Digltal SLR allows manual setting of the shutter speed. Take advantage of that. Knowing the right value is hard at first and requires experimenting. After some experiments you will already have a feeling for what shutter speed is right for what purpose. Also there is a large range of shutter speed settings that can be used it all depends on how much blurriness you are looking for.
The other option is to freeze the runner but blur the background. This is much harder to achieve. The technique to doing that is to set the Digltal SLR shutter speed to the right one to achieve the amount of blurriness wanted and to pan the camera at the exact same speed as the runner is running at. The result will be that the runner will stay on the same area of the camera sensor while the background will be moving and blurry.
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