Understanding White Balance

Written by Ken Henderson

Continued from page 1

Photographic film recordsrepparttar light that is reflected off an object. Ifrepparttar 136617 object is grey, how do we getrepparttar 136618 image on film to be grey, if we don’t know what colorrepparttar 136619 light is that is hittingrepparttar 136620 grey object and reflecting ontorepparttar 136621 film? Film manufacturers have basically solved this problem by calibratingrepparttar 136622 film to a certain color balance or color temperature. You have two choices, daylight (5500 degrees kelvin) or tungsten (3200 degrees kelvin). So if you are shooting film outdoors, you would choose daylight balanced film. If you are shooting indoors, you would choose tungsten balanced film. Any deviation in color temperature from these two standards would have to be corrected with a color correction filter.

A digital camera works pretty muchrepparttar 136623 same as film. The recording device inrepparttar 136624 camera has to be calibrated torepparttar 136625 color ofrepparttar 136626 light in order to get a neutral image. Neutral meaning no color cast. A white will record as white. Different digital cameras use different methods of letting you chooserepparttar 136627 color balance. Most digital cameras will have an auto white balance function. In most situations this works fairly well. However there are occasions whenrepparttar 136628 camera can be fooled. This is why a lot of digital cameras also give you a way of settingrepparttar 136629 white balance manually. Either through a list of choices like daylight, shade or overcast, or a list of color temperatures such as 3200, 5500 and 6500. Some digital camera’s take it a step further and let you choose a custom white balance by having you photograph something white and use it as a reference for white balance.

Getting Creative

By usingrepparttar 136630 white balance in your digital camera you can “set it wrong” to create different moods of light in your images.As an example, lets say you are photographing a field covered in snow on a sunny day but you wantrepparttar 136631 image to reflectrepparttar 136632 fact that it is only 10 degrees outside. If you were to set your digital camera’s white balance at anything lower then 5500 degrees kelvinrepparttar 136633 resulting image would have a blue cast to it making your image ‘feel’ cold. Experiment a little with it. Don’t just play around with aperture and shutter speed, play withrepparttar 136634 white balance too.

Ken is a long time photography enthusiast who has created a web based publication on photography techniques. See more tips and techniques at www.explore-photography.com

The Basics of Home Audio Speakers

Written by Ross MacIver

Continued from page 1

The size ofrepparttar enclosure affectsrepparttar 136504 overall sound of home audio speakers. Speaker drivers are designed to be housed in a particular volume of space, so that they can reproduce sound accurately. Generally speaking, bigger speaker enclosures will give better sounding bass notes, althoughrepparttar 136505 enclosure may be ported to provide large volume in a small enclosure.

When you are buying home audio speakers, try to compare several sets atrepparttar 136506 same time. Most professional audio stores will have an audio room where you can make A/B comparisons between various speaker systems. Bringing your own CD and listen to familiar music so you can hear more accuratelyrepparttar 136507 differences betweenrepparttar 136508 assorted speaker systems.

You can read all kinds of specifications and data sheets, but ultimately,repparttar 136509 choice is yours. Let your ears decide which home audio speakers soundrepparttar 136510 best. By comparing a few speakers inrepparttar 136511 same price range, you can make an informed decision about which ones are most suitable for you.

Ross is an audio enthousiast and editor of Audio, Peronal Audio MP3 and Streaming Howto's Selected Audio-Reviews.com

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