Understanding White Balance

Understanding White Balance

Photo by Hassan Rafeek

If you’ve ever taken photos indoors, without a flash, and wondered why everyone looks so orange, then this article will definitely help you. White balance can be hard to master at first, but once you understand it a little more, it can become quite intuitive, and understanding white balance is absolutely key to making your photos look good.

What is White Balance?

The White Balance (WB) determines how accurate the colors in your photos come out, specifically; it determines how “hot” or “cold” an image feels. Setting your WB accurately will prevent against nasty color cast which makes your image look unnatural. Different color casts come from white not being a true white in different lighting situations, this post will teach you how to deal with that.

How do I deal with White Balance?

Modern DSLR cameras give you the option to change the WB manually as well as giving you an auto white balance [AWB]. AWB is often suitable for daylight situations, but in most other situations, it’s just having an educated guess at what the balance should be. The most common example for this is when shooting indoors in tungsten light. In a typical DSLR you will typically have this kind of scale of white balance to choose from:

Auto White Balance
Good if you don’t know what you’re doing and it works well in sunlight, but in most situations it’s not suitable.

Auto mode can been good in daylight, but not perfect. Best to use this mode in daylight, but most people tend to stick to auto because they’re worried about forgetting to change the WB when they go back indoors.

Auto mode makes photos look a little cold in the shade so using this preset will be a lot more accurate.

This is pretty self explanatory as to when you’d use it.

This light comes from incandescent bulbs found in your home and if left on auto your photos will come out very warm with an almost orange color cast.

This comes from tube lighting found in offices and hospitals. It’s a very cold light and can make your photos appear blue. This is also why offices have that nasty sterile feel.

This compensates for the somewhat cool light of the camera’s built-in or external flash.

Custom White Balance
This is used for setting the white balance accurately using a grey card.

This is for experienced professional photographers to set exact color temperature needed.

All of these modes simply tell your camera how much it should adjust the color of the photo it’s taking.

How to get Perfect Color Reproduction

In fact “Custom white balance” or selected “Temperature” modes used to create the most accurate white balance. Firstly though, you need to learn about grey cards.

Grey cards are used to determine which white balance should be used by your camera as they are a made from 18% grey which is a neutral hue. They work by taking a photo of the card that fills the whole frame of your camera and then setting this as the white balance inside your camera. The camera sees the difference between the result and the neutral hue and determines the balance from that. The reason a grey card is used over white is because if you overexpose any color enough, it’ll eventually come out as white and WB is all about color, not brightness. As the grey photo was taken in the same lighting environment as the rest of your photos will be, the camera knows exactly how much to adjust the balance.

Custom: This is where you would take the photo of the grey card and set it as your white balance. All cameras are different so please look in your DSLR manual how to do this. This is the most accurate way possible to capture color on the cheap and is recommended.

Color Temperature / Kelvin: This is for professional photographers who are used to using expensive color temperature meters in studio conditions and setting the WB value manually. The value is set in Kelvin’s – named after the man who created the scale. For example sunlight is approximately 5200K and tungsten is approximately 3200K. If you’re really experienced with WB then after time you’ll be able to judge it for yourself.

Which Setting to choose?

Basically you have five options:

Shoot in [AWB]. You can spend all your time shooting on auto mode and hope for the best. This is alright if you’re still trying to get to grips with exposure.

Use preset modes. Try and use the preset modes inside your camera to get accurate results. This is certainly a step in the right direction, but they’re still just ballpark figures and won’t always produce 100% correct results.

Shoot in custom mode. This is the most popular choice by professional photographers, but will take some time to get used to and requires carrying around a grey card.

Use a light temperature meter. This is very accurate, but can cost a lot of money so is not really an option for most.

Shoot in RAW. RAW is an uncompressed file format that allows you to still change things on a computer after the photo has been taken. One of those things in the white balance.

With the information above you should be well on your way to capturing the perfect colors every time.

(via Expert Photography)