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by Ana Tatu
Ana Tatu
January 29, 2014
Best of 2014JuicyHot!Great Value


Understanding the Concept of Clarity in Photography – A Fight between Pixels and Optical Zoom

Clarity or sharpness is a term used to describe a photographic image. For an image to come out looking clear, crisp, and sharp, you should take care to get the necessary requisites properly incorporated which include the tools you use, the effort you put in, and understanding the nuances of image formation. With the ushering in of digital era, the pixels have started playing a huge role in the image creation though the optical zoom still holds its sway over how clear an image is formed.

Why Optical Zoom Matters?

The use of optical zoom in a digital camera is for the purpose of viewing objects that are far away, in a closer range. The adjustment of the lens is the main factor that influences optical zooming. The zoom is accomplished by means of mechanical lengthening of the camera lens which introduces telescopic effect. This zoomed picture is then changed by the camera to its megapixel capacity. Digital cameras with optical zoom are considered best if you want to take photos of far-flung subjects. The lens used here is a true zoom that is normally used in a film camera. To get a high quality image, an optical zoom is must.


Digital Zoom for ‘in-camera’ Image Changes

Digital zoom in cameras aids in processing the images inside the camera. An image is enlarged in the center while the edges are trimmed and the resultant effect is that of a photo editing software where you crop away unwanted parts of a picture and enlarge the rest. But this enlargement actually broadens the pixels which in turn can diminish the resolution and affect the picture quality.

Why Pixels are Vital?

Though many people speak of images in their mobiles or digital cameras in terms of megapixels, they are not the only factor for getting clear images. A megapixel constitutes a million pixels and denotes the number of million pixels that the digital camera can capture. For getting an image that is crystal clear in your camera, all you need is a 4 megapixel resolution.

When it comes to printing the photos, the megapixel size certainly counts. Even with the standard photo size, you will not be requiring a camera over 4 megapixels. This is true for viewing the photos on your system monitor too. Cameras which have a higher quality CCD sensor and fewer megapixels can give you photos with more clarity than a camera with just high megapixel count and low sensors.
How Optical and Digital Zoom Differ?

With a 12 megapixel camera that uses 6x optical zoom, the image you get is of high quality and crisp. The same megapixel with a digital zoom of the same size will not produce a high clarity image. When using both digital and optical zoom, the same effect is produced than when you use only the optical zoom.

For a sharp image in long distance photos, an optical zoom of higher range is needed. For small pictures in a photo album or on the internet, digital zoom is sufficient.  For a clearer picture, you need a long optical zoom and a good pixel resolution. Both are therefore vital for picture clarity. So, next time you think of grabbing a camera for yourself, you know already what should be your utmost priority.

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