Digicam file formats

Written by Jakob Jelling

By Jakob Jelling http://www.snapjunky.com

Looking atrepparttar digital camera, a person can visualize it as a combination of a camera along with a miniature computer system that storesrepparttar 116165 images as files or sets of bits, rather than a chemically treated film. Thus it comes to be a fact that there are certain file formats in which these images ofrepparttar 116166 photographs captured byrepparttar 116167 camera are stored. And again, this is subject of discussion for understandingrepparttar 116168 digital camera properly. In this effort this discussion revealsrepparttar 116169 intricate but overlying to provide a brief overview torepparttar 116170 readers regardingrepparttar 116171 file formats ofrepparttar 116172 digital cameras.

Basically, strictly consideringrepparttar 116173 facts, there are three file formats used by digital cameras to create images of photographs taken by them. These are JPEG, TIFF and RAW. These arerepparttar 116174 names ofrepparttar 116175 formats but like their strange names their identity remains inrepparttar 116176 dark if these are not conversed in a little detail. The most vastly and commonly used file format for digital cameras isrepparttar 116177 JPEG file format. It is time and againrepparttar 116178 lone available file format on primary and some intermediate standard digital cameras. Many sophisticated digital cameras allowsrepparttar 116179 users to opt for between JPEG, TIFF and RAW. However professional photographers usually prefer to shoot RAW. Yetrepparttar 116180 discretion remains withrepparttar 116181 human preference only.

It is a fact thatrepparttar 116182 acronym JPEG stands for "Joint Photographic Expert Group" afterrepparttar 116183 group that developed this file type. To make things easier it must be clarified that JPEG is a compression technique that can considerably trim downrepparttar 116184 file size of a photograph and other unremitting tone images. Almost all digital cameras have a number of JPEG compression levels and quality settings to select from. The users can make use of them as per discretion andrepparttar 116185 photograph taken. Thusrepparttar 116186 jpeg images do not consume much space on a memory cards. Another specialty of this digital camera file format is that JPEGs store camera settings and scene information. All these advantages make this file format so popular and diversely accepted.

Digital zoom versus optical zoom

Written by Jakob Jelling

By Jakob Jelling http://www.snapjunky.com

The digital camera is but a technological advancement ofrepparttar conventional analog camera. And thus every component ofrepparttar 116164 analog camera must have been upgraded or changed to bring in some improvisations. This discussion is an effort to unravel alteration and make one comparison between what was and what is! This discussion is thereby focused upon a very critical component of a camera (analog as well as digital),repparttar 116165 zoom!

Before making a comparison it is important to discussrepparttar 116166 significance ofrepparttar 116167 subject matter, in this caserepparttar 116168 zoom. Well a zoom lens has more than a few portable glass components inside it. By adjusting these components,repparttar 116169 focal length ofrepparttar 116170 lens can be altered. Modifyingrepparttar 116171 focal length altersrepparttar 116172 view distance as well as reducesrepparttar 116173 field of view, thereby makingrepparttar 116174 projected image to appear larger.

It must me noted that bothrepparttar 116175 optical zoom andrepparttar 116176 digital zoom are components that are used to magnify an image, but they work in fundamentally different principles and acquiesces drastically different results. In general, optical zooms always produce a far finer and advanced image than digital zoom.

Looking atrepparttar 116177 functions of these zooms, in digital cameras that offer optical zooms functionrepparttar 116178 same way similar to a zoom lens of a conventional analog camera. A conventional lens works by accumulating light rays that are projected over a portion of a film, and in this case of a digital camera optical sensor. The distance ofrepparttar 116179 lens fromrepparttar 116180 focus point where all ofrepparttar 116181 light rays converge is known asrepparttar 116182 focal length ofrepparttar 116183 lens. Unlikerepparttar 116184 optical zoom,repparttar 116185 digital zoom works by rangingrepparttar 116186 pixels inrepparttar 116187 ultimate image afterrepparttar 116188 image has been captured. The fact remains thatrepparttar 116189 same number of pixels are collected whenrepparttar 116190 photograph is magnified. The only thing that alters isrepparttar 116191 light rays that are projected overrepparttar 116192 optical sensors to figure out those pixels.

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