Please wait while the page is being loaded Skip this advertisement >
Sunday | 7 September, 2008
ARN
Digital Cameras
Related Stories
  • +

    Life on the EEEdge: Daily life with Asus' tiny laptop 04 January, 2008 07:15:21

    6 annoying things (and 3 great ones) about Asus' ultraportable
    Like many gearheads, I've owned a lot of portable computers over the years -- and I've wanted to replace every last one with a smaller, sleeker upgrade, from the "luggable" Apple IIc onward. But most of those upgrades have left me disappointed: with the lack of software; with cheap, hard-to-use interfaces; and with "optional" add-ons that were in fact very much necessary to make the machine useful.
  • +

    Keeping it simple 03 October, 2007 10:11:50

    Stronger partner engagement is top of the list for Websense's first local channel sales manager, Mark Spencer. He recently talked to ARN about his partner aspirations, channel history and the need for simple but effective programs.
  • +

    'Radical rethinking' of Internet routing under way 28 September, 2007 14:34:24

    Cisco, Juniper and others consider big changes to Internet’s core routers
    Some of the world's top network engineers are engaged in a research effort that could lead to the most radical redesign of the Internet's underlying routing architecture since it was developed in the 1980s.
  • +

    Notebook Products: the latest for the week commencing September 26, 2007 26 September, 2007 16:16:24

    The latest Notebook products are reviewed for the week commencing September 26, 2007.
  • +

    Making the right sale 26 September, 2007 15:52:52

    Notebooks come in a huge variety of shapes and sizes as manufacturers cater to the wide range of mobile needs presented by different user groups. This can make finding the right model for any particular customer and maximizing the sales opportunity a difficult task. HP personal systems group program manager, Robert Bergqvist, provides a guide to making the right sale.
Additional Resources
ARN Library

Newsletter Subscription

Sign up for our ARN newsletters!
The premier provider of daily news to the IT channel, covering business, technology, products, and services.
RSS Feeds


Photo Terminology

As a PC user you might be under the impression that mastering digital photography is simpler than film photography. In fact, to get the most out of a middle or top of the range digital camera, you need to know exactly the same fundamentals about photography. For those of you who aren't too familiar with photo terminology, here are some quick explanations to help.

Aperture: The aperture of a lens is related to its diameter and is a measure of how much light the lens allows in. Altering the aperture, therefore, is an important means of controlling the exposure recorded within the image. Aperture is measured in f-stops, although, confusingly, the larger the aperture, the smaller the f-stop.

f-stop: A measure of how much light a lens lets in. More precisely, it's the ratio of the diameter to the focal length. So a lens with a true focal length of 20mm, which is 10mm in diameter, has a maximum aperture of f/2. An implication of this is that a zoom lens will have a smaller maximum aperture when it is zoomed in.

Shutter speed: This is the length of time light is allowed into the camera when a photo is taken. Commonly, shutter speed can be varied from 1/1000 second to a few seconds. One of the most important things to note about shutter speed is its effect on movement. With a slow shutter speed, typically, less than 1/60th of a second, a moving object will be portrayed as blurry. Faster shutter speeds allow the user to capture a moving object much more clearly - even droplets of water in a fountain will appear to be frozen in mid-air.

Focal length: The focal length is a property of the lens which dictates the amount by which it magnifies the scene. The zoom control on higher-end cameras is the means by which the focal length is altered. Commonly, the focal length of a digital camera is given as a 35mm equivalent because so many people are familiar with 35mm cameras. The actual focal length will be shorter, because the CCD is smaller than 35mm film.

You should also be aware that changing the focal length affects perspective. A short focal length exaggerates perspective; a long focal length shortens it.

Market Place

ARN Member Login

 
Panel Sessions
  • ARN Panel Sessions: Day 3

    The last of our panel sessions recorded live at CeBIT 2008. Today, the topic is storage. Data is growing at an enormous rate, so what does the future hold?

Play
ARN news Channel Watch
  • Brian's bloopers

    It takes a long time to produce an episode of Channel Watch. Maybe you'll understand why after watching this...

Play
Business Continuity & Disaster Recovery Zone

When an IT disaster occurs, how handy it would be to push a button and start again as if nothing had happened.
Discover and learn more about CA XOSoft today.
ARN Vendor Directory
ARN Library

Bankstown Council streamlines their IT with Microsoft® Windows Server® 2008

Deciding it was time for more streamlined operations, Bankstown Council teamed up with OSS Infotech, a Microsoft Gold Certified Partner. The solution included Microsoft Windows Server, Microsoft SQL Server® and Microsoft Exchange®.

Sponsored Links