H+DasChagas

media type="custom" key="12126242" align="center"

[|Helmer Das Chagas]

==//__ DIGITAL ZOOM __//- is a method of decreasing (narrowing) the apparent **[|angle of view]** of a digital photographic or video image.==


 * A 1.6X digital zoom will only use the information of a 1,600 x 1,200 crop and discard the rest (2,560/1.6=1,600 and 1,920/1.6=1,200). In image C, the camera has captured the same field of view as in image B but only uses 2 megapixel out of the 5 megapixel resolution! If the digital camera has the option to output 1,600 x 1,200 images, the crop will be saved as a 2 megapixel image. In most cases, the 1,600 x 1,200 crop will be [|upsampled] to the full resolution of the camera as indicated in image D. No additional information is created in the process and the quality of image D is clearly lower than image B.**
 *  ZOOM ON A CAMERA can add to the pleasure of digital photography. However, many consumers are confused between optical and digital zoom. An understanding of the difference between the two zooms will help you choose the digital camera that is right for you. **
 * Most people who have used a 35mm camera or an APS camera are aware of only optical zoom. Optical zoom uses the optics (lens) of the camera to bring the subject closer. Digital zoom is an invention of digital video cameras. It is not uncommon to see digital videocams with 300x digital zoom. **
 * For our purpose, digital zoom is not really zoom, in the strictest definition of the term. What digital zoom does is enlarge a portion of the image, thus ‘simulating’ optical zoom. In other words, the camera crops a portion of the image and then enlarges it back to size. In so doing, you lose image quality. If you’ve been regularly using digital zoom and wondered why your pictures did not look that great, now you know. **
 * Is digital zoom therefore all bad? No, not at all. It’s a feature that you might want in your digital camera (in fact, all digital cameras include some digital zoom, so you can’t really avoid it), especially if you don’t care about using (or don’t know how to use) an image editing software. So, as far as digital zoom is concerned, you can do it in camera or you can do it afterwards in an image editing software. Any cropping and enlarging can be done in an image editing software, such as Photoshop. **