Sabtu, 07 Mei 2011

Digital Camera Lens Mysteries Exposed

By Adrian Adams


With the wide array of cameras available today, you can be easily tempted to spend between a hundred and several thousand dollars for a digital camera. How do you know which one is best for you? Some features will be 'must-haves' while other features may never get used. With this article, I plan to clarify some of the mysteries about various digital camera features. This article is one in a series of many that will help you make the most educated purchase you can.

The exhaustive list of digital camera features are enough to make anyone's head spin. Everything from exposure settings, aperature, ISO to zoom magnification and image stabilization. Yet that only covers a small handful of things you'll need to evaluate. Let's simply everything and look at exactly what you need to know to help make your decision. Several other articles in this digital camera feature series will help you find just the camera you are looking for.

Most photographers are happy to let their digital camera automatically select exposure control. This means that the camera will automatically select the exposure control and/or the aperature setting. If you grew up setting these controls yourself on your film camera, or of manual override of those controls is important for your photography, then be sure to look for manual override on the feature list for your camera possibilities.

If you are interested in taking snapshots to share with your friends or family, take vacation photos or general "snapshot" type of images, then a basic zoom range of 3x will be adequate. The zoom features are actually created by several lens elements, not just a single lens. Focal length tells you the amount of zooming and refers to the physical distance from where the light enters the camera's lens elements to the focusing surface of the film (even if it's digital film). look for focal lengths of 135mm or more if you want to do sports, portrait or even nature photography. Otherwise 105mm as a top end will work well for most applications.

One common feature you'll note relating to a camera's zoom is optical vs. digital zoom. While the term "digital zoom" has a fancy ring to it, all it does is magnify the image without adding any image detail that the camera isn't already capturing. Optical zoom, however, will actually bring you closer to your subject, enlarging the area as well as increasing the detail available to capture digitally. Software can take the place of digital zoom after the photo has been taken. If you have the choice, you'll always get better quality and more detail with optical zoom, rather than digital zoom.

Making a decision about the best digital camera for your needs is easy when you understand all the options available to you. You can save money, anxiety and stress by making a list of the features you feel are most important and then comparing to the available cameras and price points you see at your local stores. Save money and save stress by understanding your purchasing needs ahead of time.




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