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technotalks


technotalks
 

Digital Camera Basics-Resolution


By harry at 2010-02-02 01:15:44
The basics of a digital camera revolve around terms like pixel, pixel count, white balance, sensor, sensitivity, optical zoom, or digital zoom. These improve your understanding of what digital photography is all about, and will help you become a more efficient photographer.

For example, one important term is digital sensor. A typical digital camera may have a digital sensor element that is as big as a small finger nail. Most 5MP digital cameras use a sensor that is 7mm x 5mm in size. This is much smaller than the size of the negative of a 35 mm camera. However, high-end digital cameras have large sensors, and generate superior images. These are important things to know, to see how pictures can be better or worse.

To better understand what is the importance of lenses, let me compare the camera lens with a motor vehicle. If the engine is more powerful, the car will go faster.

Just like any conventional cameras, a camera (digital) is equipped with a series of lenses that can focus the light and creates the image that you want to capture. The difference is that a conventional camera focuses its light on a film while a digital camera focuses the light into a semiconductor device that electronically records the light.

Choosing a digital camera, like many other gadgets is done on the basis of technical specifications. While it is not superfluous to look for reviews of current owners of cameras, and compare images made by different cameras. You can always ask for an opinion of friends and coworkers. Let's look at characteristics which are important in choosing a particular model of a digital camera.

When buying a digital camera first feature to pay attention is a megapixel number of the camera. The widely spreaded opinion that the more pixels the better quality images, is somewhat misleading. This characteristic is responsible for the maximum resolution of photos that can be done without loss of quality. It is important to consider the quality and size of the matrix, which are the very pixels. Therefore amateur camera could have more pixels than a professional one.

The amount of detail that a camera can capture is called the resolution, and it is measured in pixels. The more pixels a camera has, the more detail it can capture and the larger pictures can be without becoming blurry or "grainy." High-end consumer cameras can capture over 12 million pixels. Some professional cameras support over 16 million pixels (megapixels), or 20 million pixels for large-format cameras. For comparison, it has been estimated that the quality of 35mm film is about 20 million pixels.

Use appropriate Scene Modes. Most of today's compact cameras have what is called "Scene Modes". Each Scene Mode corresponds to a type of photography like portrait, landscape, sport. It's better to use the scene mode accordingly to the kind of photos you want to take. If you take portrait shots then set the camera on portrait mode. In this mode the camera will use a larger aperture. As a result your subject will be in focus and standout from a blur background. If you take photos of children in movement then prefer sport mode whereby the camera will use higher shutter speed so that the subject will be sharp on the photo.

Do you need the maximum resolution - Not necessarily - if you wanted to print to a maximum size of 7"x5", say, then something around 4-5 megapixels will be fine. Would I advise shooting at this generally - NO. My recommendation to anyone shooting digital photos is to use the camera at its best resolution - you can easily reduce quality later but you can NEVER recreate it. So record whatever you take on your camera at its highest resolution with the least amount of compression so large superfine or large fine jpgs will be what you are looking for.

In a device such as a digital camera it is very important to understand the very basic aspects of the device so as to properly operate it and give it the due respect it deserves. Such a topic is interpolation! These are accessories that help the digital camera to perform the technologically advanced features that it is capable of. In extreme explanatory and simple terms it can be summed up as that interpolation refers to software programs that can effectively enlarge image resolution beyond the actual resolution by adding extra pixels using complex mathematic calculations. Now, this is a feature that can be absolutely useful in providing a good success to a user.

This VuPoint camera can also function underwater, which is a great option to have for a camera that costs less than $100. It comes with a 5 megapixel resolution. Its water resistance allows you to submerge underwater up to 50 feet and make movies with it. As a downside, it comes with no optical zoom, only digital, so you probably shouldn't count on using it at all. The speed range of the shutter is 1/10,000 of a second.


To put it simply, resolution is the amount of detail that your digital camera records of an image. A digital image is made up of pixels. For digital cameras, the number of pixels is measured just like your computer monitor. As digital camera resolutions have gotten higher, w will e now multiply the horizontal and vertical values for one total value, which is usually rounded out to the megapixel count. Some of the first digital cameras had resolution of 480 x 640 pixels. This is the same number of pixels in the computer monitor standard VGA. Multiplying 480 x 640 would end up with a resolution of about .3 megapixels. This was touted by the digital camera industry as photo-quality, but it is far from it. Most web cams support this resolution.

Read about Android SmartPhone and also read about BlackBerry Phone Review and HTC T Mobile

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