The Math
Feel free to skip right over this part, this is the boring part, it’s so boring I thought of putting a picture of an artistic nude shot next to it just to keep people awake. Ok, so here we go. Before you can calculate the depth of field you first must know the circle of confusion for your camera.

Don’t get too lost on me yet, for most of us digital SLR users this is  one of two numbers. For most of us with APS/APS-C sized sensors this number is 0.019948, for full frame sensors (the big Pro cameras) and 35mm film the number is 0.02501. This represents the sensor size. Again, don’t get all lost on me yet, just remember the number for your particular camera.

The first thing we need to calculate is the Hyperfocal distance, for this calculation you will need to know the focal length of your lens. the aperture you are using and the CoC (circle of confusion) for your camera.

The math to calculate the hyperfocal distance is as follows:

HyperFocal = (FocalLength * FocalLength) / (Aperture * CoC)

Thus, the Hyperfocal distance of a 50mm lens at f/2.8 on an APS sensor (Canon 30D in my case) is 146.85 feet.

Next we need to calculate the near point which is the closest distance that will be in focus given the distance bdetween the camera and the subject. The math here (yes, it gets SO much worse) is as follows:

NearPoint = (HyperFocal * distance) / (HyperFocal + (distance – focal))

This is somewhat  complicated because the focal length is in millimeters and those of us in the US are better with feet and inches still so if you want the end value to be in feet you have to do some more conversions. If we are using the same 50mm lens, at f/2.8 on an APS sensor at a distance of 10 feet (3048mm) then our HyperFocal distance is 146.85 feet (44,749.23mm), giving us a near focus point of 9.37 feet (2,856.66mm). Are we following along still? Did I lose anyone?

Alrighty then, let’s now calculate the far point distance, this is almost the same as before but using slightly different math, so here we go.

FarPoint = (HyperFocal * distance) / (HyperFocal – (distance – focal))

Without changing our values that we used before, we now know that are rear point is 10.72 feet (3,266.81mm). Take note that the near point is actually closer to you than the subject is, typically the focus is 1/3 in front of the subject and 2/3 behind the subject.

The final step is to calculate the total amount of focal distance. This is one I can even do without a calculator, we simply subtract the far point distance from the near point distance.

TotalDof = FarPoint – NearPoint

Giving our example so far we have a total depth of field of 1.35 feet (411.48mm).

Let’s get practical
Why on earth would you want to know this? The simple answer is you may not, nor may you ever care to know it. When shooting portraits, weddings, events, and pretty much anything else it really isn’t going to matter much. However, if you are the type that wants to set up a shot and have it be EXACTLY what you want, there is simply no other way to know what the camera is going to do. This is important in macro, food, and product photography. By knowing exactly where you focus points begin and end you can more accurately design and execute precise shots.

Ok, how about the easy way?
This is kind of like taking a digital photography class and having to spend a semester cooking your own B&W film, its good to know the theory before taking on the practical application. So how can we do this easier than having to pull a scientific calculator each time you want to set up a shot?

• f/Calc Spreadsheet (download) – This is an Excel spreadsheet that will do all the math for you. This was development by me and is free to use.
• f/Calc Windows and Palm App (website) If you want a simple but powerful Windows or Palm based application, f/Calc does Field of View, Angle of View, Magnification, Spot Meter, f Numbers, Depth of Field and Hyperfocal distance
• PhotoCalc for iPhone (website) – Not only does it do everything for DoF, it also incorporates a sunrise/sunset function, flash exposure calculator, and Exposure Reciprocation calculator.
• CamCalc (Market) Android App for Depth of field, field of view, focal length equivalents, flash calculations, color temp. conversion, miniatures, and sunrise, sunset.
• PhoforPho (Market) Android App with Exposure calculator, Hyperfocal calculator, DoF calculator, Timer, and Exposure compensation calculation for multiple exposures.

I know this has been a doozy of an article to read through just to get to some free or almost free (PhotoCalc is $2.99) tools to make it dead simple to do these calculation. Hopefully this will help you perfect your images help you to use depth of field to its full extent.

Getting Started
Most cameras, including newer point and shoot cameras will let you shoot in full manual mode. The problem with going manual is that if you don’t have your settings “just right” you can end up with an image that is too dark or too light. Without a basic understanding of the different settings, it can be difficult to get a good shot. However, with a basic understanding of the three variables even the most newbie photographer can learn to take better pictures by getting away from the automatic settings.

ISO Speed
The ISO speed is equivalent to the ISO speed we used to use on film cameras, this describes the light sensitivity of the film that is being used. The higher the ISO speed, the more light the sensor can pick up. For example, if your camera is set to ISO 800 you can take a well exposed image in a darker room than you could with ISO 100. By definition you would always want to run your camera in the highest ISO speed possible. While this may sound like a good idea, the downside is that the higher the ISO speed, the more “noise” will be introduced to the image, thus degrading the image quality. In most cases, you will get excellent results by using ISO 200-400 outdoors and 400-800 indoors. This does not take into account your camera model as some cameras do better than others at the higher ISO settings.

Shutter Speed

Medium Shutter Speed to Show Movement

The shutter speed is one of the easiest settings to understand as it simply means how fast the shutter opens and closes when you press the shutter button. The faster the shutter speed the better the camera will freeze the action of an event. This setting is represented in seconds, a fast shutter speed would be something like 1/2000^th of a second. A long shutter speed such as 1/30^th of a second or slower can result in blurry images if you don’t use a tripod. Like the other settings, the shutter speed also affects the amount of light that hits the sensor. The faster the shutter speed, the less light that comes into the camera. So while a fast shutter speed can freeze action, you need more and more light in order to prevent getting a dark picture the faster you set the shutter. When you cant get a bright enough image, you will need to slow down the shutter speed. In some cases you may want to get a motion blur such as a waterfall or freeway traffic, these shots require a very long shutter speed.

Shallow Depth of Field

Aperture
Understanding aperture is probably the most difficult setting for most people to grasp, because of this we wrote an entire article about it. The aperture is an adjustable opening in the lens that controls the amount of light that can enter the camera. The aperture setting is expressed in f stops with the largest opening having a smaller number so a wide open aperture is going to have an f-stop of around f/1.4. The aperture setting can have a big effect on the depth of field which allows one part of the image to be in focus and the rest of it being blurry which helps to highlight the subject of the photograph.

Starting Points
Without having a light meter or lots of experience how do you know what settings to start with? The way I learned was to set my ISO to what I wanted, typically 200-400 ISO outdoors and 400-800 ISO indoors, and put the camera in P mode and press the shutter half way down. Inside the viewfinder the camera will show the settings it will use to take the picture. Then you can put the camera into Manual mode and adjust the settings to match. After some practice you should be able to set some basic settings fairly close to what they need to be, then, by pressing the shutter half way down the camera will autofocus and then take a meter reading which should show in the viewfinder or on a display depending on your camera. Then you can adjust shutter speed or aperture to change the exposure to get it where you need.

Using the Histogram
If your camera will display a histogram after shooting an image, then you need to take advantage of this feature. By looking at the histogram of an image you can quickly tell if the image was properly exposed or not. With a digital SLR camera you want the histogram to be a nice curve with the curve being just to the right of center like our example one here. This is actually saying that the image is just slightly overexposed. With film, if you overexposed the image, you would lose detail so it was better to slightly underexpose. With digital, shadows will lose detail so it is better to slightly overexpose.

Practice Practice Practice
There is nothing that will beat getting out and getting behind the camera and learning how to use it well. If you plan on making photography a serious hobby or more, you will need to learn how to use manual mode for those times when the automatic or program mode settings just won’t cut it or for when you want to create an effect that you just can’t get any other way.

Get out and practice and be sure to post some comments and post some pictures to our Flickr group.

How to get the lighting we want

By now we would hope you wouldn’t be asking how to get your lighting setup dialed in, but if you need a little refresher you should start off with the following articles:

• Lighting ratios for portraits
• Using a Light Meter for Proper Exposure
• Understanding Light Stops

For the rest of the article, different images will also be presented with lighting diagrams to help illustrate exactly how each look was obtained.

Broad Lighting

Broad lighting is certainly the easiest lighting style to use since the camera side of the face is lit brighter than the far side of the face. This look is easily obtained by simply bouncing your flash off a wall or reflector to the side of the camera back onto the subject. Broad lighting used to be taught as the “feminine lighting†but that is certainly not always the case.  Broad lighting will tend to make a face look wider which is not always a look that is the most flattering. With the right subject, broad lighting can certainly achieve very nice results.

With the subject facing to the camera right and a large light source to the camera left a broad light effect is created putting the side of the face furthest from the camera into shadow. With the tilt of her head it gave her face a more rounded appearance.

Short Lighting

Short lighting is considered by many to be the most flattering style and is certainly my personal favorite. Short lighting will tend to make a face look thinner. Short lighting is also harder to achieve because it virtually requires off-camera lighting since the light is coming from behind the subject.

With the shadow on the camera side of the face, the face looks thinner. Keep in mind, the examples so far have been achieved on the same location spot using only natural light and simply moving the subject and camera position to get the desired look.

Split Lighting

Split lighting is not very popular and is probably the least used of the different lighting styles. In split lighting the light is split down the middle of the subject’s face dividing it in half. The lighting setup is fairly simple with two lights on either side of the subject and one using less power than the other. I personally really like the split lighting effect to give someone some images that will have a different look than they are likely to get from other photographers.

As you can see, split lighting can be very effective and with just a slight turn of the head can look like a mix of split lighting and short lighting,

Summary

I hope this has given you a new set of tools to use to improve your portrait lighting techniques, done properly you can achieve a very classic, timeless look that your clients will love. The key to mastering any of these is to practice, practice, practice. Get some lights setup for one style, maybe get a model from a place like Model Mayhem, and work on each style until you really have it nailed down. Next time we will look at Rembrandt and Butterfly lighting.

Later, the guys discuss the use of a light meter and how it can help you get your exposures fast and accurately in-camera and save you time in post-production.

Show Hosts

Kerry Garrison
http://kerrygarrison.com
Twitter: http://twitter.com/kerrygarrison Facebook: http://www.facebook.com/profile.php?id=822369545

David Esquire
http://esquirephotography.com
Twitter: http://twitter.com/esquirephoto Facebook: http://www.facebook.com/profile.php?id=636655600

This podcast is also available on iTunes.

With Extreme 24.5-Megapixel Resolution, Processed Image Files Exceeding 138 MB, Five Frame-per-Second Burst Speed and Nikon Core Technologies, the D3X Ushers in a New Level of Image Quality

MELVILLE, N.Y. (Nov. 30, 2008) - Nikon Inc. today announced the D3X, an FX-format digital SLR featuring extreme 24.5-megapixel resolution and superb low-noise capabilities, which provides professional photographers with commercial-quality image performance in a familiar and extraordinarily versatile D-SLR form factor. In conjunction with the groundbreaking Nikon FX-format D3, the D3X tops off a collection of flagship level, rugged, professional caliber digital single lens reflex cameras engineered to excel in all types of professional photographic disciplines from photojournalism and sideline sports, to commercial in-studio applications.

The foundation of the enhanced performance of the D3X is its FX-format, 24.5-megapixel (6048 x 4032) CMOS sensor providing commercial, high fashion, fine art and landscape photographers with the extreme resolution, dynamic range, color depth, detail and sharpness that clients demand. Whether creating catalogs, magazine covers, billboards or gallery prints, the large 5.49-micron pixel size and high signal to noise ratio produces vibrant images with breathtaking image fidelity while reducing lost highlights and shadows, and ensuring smoother tone reproduction with minimized noise. With full resolution shooting speeds of up to five frames-per-second (fps), and 14-bit files, that when processed are approximately 138 MB, the D3X offers today’s photographic artists an extreme level of performance and versatility ready for demanding assignments in the studio or on location.

“In 2007, the 12.1-megapixel FX-format D3 delivered groundbreaking digital SLR image quality, coupled with incomparable high ISO, low noise performance and high-speed handling. In doing so, the D3 broke photographic barriers, enabling photographers to work in ways never before possible,†said Edward Fasano, general manager for Marketing, SLR Systems Products at Nikon Inc. “Now, the new 24.5-megapixel FX-format D3X D-SLR provides the extreme resolution and high dynamic range capabilities needed to meet the extraordinary needs of photographic disciplines such as high fashion, commercial advertising and fine art. The D3X delivers this remarkable capability while fitting seamlessly within the Nikon system, taking full advantage of Nikon’s world-renowned collection of NIKKOR lenses and Speedlights.â€

Image Quality Takes Center Stage
To re-emphasize the importance of image quality above all else, the D3X delivers an incredible level of digital SLR performance to provide photographers with extremely high resolution, exceptional dynamic range, phenomenal total gradation and outstanding color reproduction. Image files can be recorded as TIFF, JPEG or NEF (RAW) formats in either 12- or 14-bit compressed or uncompressed formats, and recorded to UDMA compatible CompactFlashâ„¢ cards for optimum speed. Photographers can save image files directly to the dual card slots as overflow, backup, or as separate file formats to different cards. Building on the D3X’s flexibility, users have the creative option to shoot in the 5:4 crop mode with 20.4-megapixel resolution, the ideal format for creating 8 x 10-inch portraits. While using DX-format lenses, faster continuous shooting of up to seven frames per second can be achieved at a resolution of 10.5 megapixels.

The exceptionally low noise of the D3X is essential to any professional commercial application, and it provides photographers with an ISO range of 100 to 1600, expandable to 50 (Lo-1) and 6400 (Hi-2). The ultra smooth tones and lack of grain at ISO 1600 as well as at low sensitivity settings result in smooth, natural skin tones and exacting detail that, before the D3X, required larger and far costlier studio-bound camera systems.

Advanced Technologies, Meticulously Executed
In a commercial setting or on location, imaging professionals need high performance in both speed and processing. The Nikon D3X can shoot at up to five fps at full resolution or up to seven fps in DX crop mode, allowing photographers to catch the split-second difference in a model’s expression or capture all of the action in a sequence. Just like the D3, the D3X achieves a start-up time of a mere 0.12 seconds and a shutter release time lag of 0.04 seconds.

The D3X’s speed, as well as high levels of performance, leverages Nikon core technologies including a newly enhanced EXPEED™ Image Processing System, specially designed for the D3X to provide superior image quality, faster processing speeds and lower power consumption. This advanced system is able to achieve extremely precise color reproduction for a broad spectrum of hues, in addition to vivid saturation and smooth gradation. What’s more, Nikon’s advanced noise processing function is engineered to minimize noise at all sensitivities and operate seamlessly without interfering with other image color parameters.

The D3X also features Nikon’s exclusive Scene Recognition System, which continuously analyzes information from the 1,005-pixel RGB light sensor, to further refine auto exposure, auto white balance and autofocus calculations. This results in flattering portraits and awe-inspiring landscapes that portray accurate color and fine details. Nikon’s exclusive 3D Color Matrix Metering II helps ensure accurate exposures, even in the most challenging lighting conditions. Instantly evaluating each scene before capture, input data from the system’s sensor is automatically referenced against an internal database of more than 30,000 images derived from actual photographs to calculate correct exposure values. Active D-Lighting, used in combination with 3D Matrix Metering II, helps to determines proper exposure, and creates realistic contrast while compensating for lost shadows and highlights. Prior to shooting, users can choose from Extra High, High, Normal, Low or Off settings, as well as an Auto mode.

Additionally, the D3X features Nikon’s exclusive Multi-CAM 3500FX focus module, with 51 AF points, 15 cross type sensors and 36 horizontal sensors that easily track and lock onto moving subjects, delivering the same fast and accurate AF performance that helped make the D3 immediately successful. Users can select any of the AF points, making it easy to consistently attain accurate focus right on a subject’s eyes, frame after frame. Additionally, three AF-area modes – Single point, Dynamic-area AF and Auto-area AF – are available to maximize the use of the 51 focus points by selecting the most suitable one to match subject conditions. AF is also available in one of two Live View modes optimized for the studio, including a phase detection handheld mode and a tripod mode. This feature allows the user to zoom in up to 27x on the LCD screen to ensure critical focus. While in Live View, the graphic indication of a virtual horizon is also available, making it easier than ever to confirm camera orientation.

To further ensure each photographer’s ability to balance their personal style, Nikon’s Picture Control System enables users to adjust their images to pre-set parameters such as Standard, Neutral, Vivid and Monochrome that apply tweaks to image sharpening, tone compensation, brightness, overall tone and saturation. Photographers have creative control over these image parameters with the use of up to nine available customizable presets.

Synchronizing Both Form and Function
Engineered for real-world functionality, the D3X retains a rugged shell with moisture, dust and shock resistance that has become a hallmark of flagship Nikon D-SLRs, while preserving the usability and ergonomics that allow the camera to remain an extension of the photographer’s vision. Attention to detail goes so far as to include a self-diagnostic shutter system that is tested to exceed 300,000 cycles for maximum durability and longevity. The camera’s body also maintains the resilient magnesium alloy construction and form factor of the D3, promoting consistent Nikon system synergy.

A bright and accurate viewfinder offers 100 percent coverage with 0.7x magnification. The body also houses Nikon’s acclaimed 3.0-inch super density LCD screen, now relied upon by so many photographers. The high-resolution 920,000-dot screen is viewable at wide angles up to 170 degrees, and will allow photographers to quickly zoom in to confirm critical focus. Users can also output the video signal to an external display via HDMI to allow client viewing. Thanks to incredibly efficient internal circuitry, the D3X can capture up to 4400* shots per single charge of the camera’s Lithium ion battery.

System Strength Withstands the Test of Time
The D3X is fully compatible with Nikon’s Creative Lighting System (CLS) to give photographers a mobile lighting solution that is easy to manage. To further enhance mobility, the D3X is compatible with Nikon’s GP-1 GPS receiver to gather information such as latitude, longitude, altitude and date of shooting. Photographers can easily shoot tethered via USB, or use the WT-4a wireless transmitter to send images wirelessly when speed and mobility are essential. D3X users will also enjoy the system strength of more than 50 genuine NIKKOR lenses that provide outstanding sharpness and high resolution across a broad range of focal lengths.

Price and Availability
The Nikon D3X will be available at Nikon Authorized Professional Dealers starting December 2008, and will be available for an estimated selling price of $7999.95.**

* Based on CIPA Standards
** Estimated selling price listed is only an estimate. Actual prices are set by dealers and are subject to change at any time.

• 21.1 Megapixel Full-frame CMOS sensor, 14-bit A/D conversion (16,384 colors/each of 3 primary color), wide range ISO setting of 100-6400 (expandable L: 50, H1: 12800 and H2: 25600).
• Full HD Video capture at 1920 x 1080 resolution for up to 4GB per clip with HDMI output for HD viewing of stills and video.
• Next generation DIGIC 4 Image Processor for faster processing of fine detail and color reproduction as well as reduced image noise.
• High performance with 3.9 fps continuous shooting, new shutter with a durability of 150,000 cycles and improved weather-resistant body.
• Live View Function for stills (Quick, Live and Face Detection AF modes) and video.
• 3.0-inch Clear View LCD (920,000 dots/VGA) monitor with anti-reflective and scratch-resistant coatings for improved viewing and smudge protection.
• Updated EOS Integrated Cleaning System specifically designed to work with a full-frame sensor.
• Compatible with over 60 Canon EF/EF-S lenses and most EOS System accessories.

The EOS 5D Mark II features a huge, full-frame sensor. A 21.1-megapixel CMOS sensor delivers images of up to 5616 x 3744 pixels. And since it is full-frame, all lenses will deliver the angle of view they would on a 35mm camera without a conversion factor. This comes in handy especially when shooting with wide-angle lenses. For the flexibility to shoot in even the most dimly lit situations, the EOS 5D Mark II offers Canon’s highest ISO sensitivity to date, ranging from 100-6400 (expandable to ISO L: 50, H1: 12800 and H2: 25600). Thanks to improved noise reduction technologies, images shot even at highest sensitivity will be remarkably smooth.

The Canon EOS 5D is slated to ship towards the end of November 2008 at an expected street price of US$2699 in the U.S.

First off you need to realize that studio flashes like the PhotoBasics StrobeLites are not automatic like the on-board or accessory flash on your camera. A studio light doesn’t know what you are trying to do and will not adjust itself for the camera settings you have dialed in. You also need a means of firing the lights off when you press the shutter, all that and more will be covered in this article.

Connecting the lights to your camera

PC Sync port on Canon 30D

The first thing we need to do is to connect the lights to your camera, for this we are going to need what is called a PC Sync port. On most Canon DSLR’s the PC Sync port is on the left side of the camera under a rubber flap. In the image here you can see the PC Sync port and the end of a PC Sync cable. In my typical setup I will have the main light plugged into the PC Sync port to fire it and the other lights will automatically fire at the same time because they have a built-in optical slave that will fire the flash when another flash is detected. Since this happens far faster then the mechanical shutter, the effect is that all of the lights fire at exactly the same. There is a limit of how fast the lights will sync to the camera but we will address that in a moment.

Weim Hot Shoe Adapter

If you are unlucky enough to not have a PC Sync port on your camera then you will need to purchase a hot shoe adapter. The recommended one is the Weim Hot Shoe Adapter which sells for about $50 at most places. This will got into your camera’s hot shoe (when an acessory flash plugs in) and has a PC Sync output port on it.

As I mentioned, the lights do have an optical slave so they will fire when another flash is used so you may think you can just use the flash that is built into your camera to fire off the big lights. While this will work to an extent, the problem is that unless you know how to adjust your flash’s output compensation, the flash is going to fire at a level that your camera expects will be correct for the given light, when the big lights fire along with the built-in flash, your subject will no be over-lit and the scene becomes overexposed.

Rear view of StrobeLite

The opposite end of the PC Sync cord plugs into the back of the light. In this image you can see the 1/8th inch mini plug port on the bottom right hand area of the strobe head. With the camera and the lights connected, you are all ready to take some amazing images right?

If ONLY it was that easy. Now actually comes the hard part, figuring out how to get the light set right for a proper exposure. Hang in there, it won’t hurt too much.

Getting the lighting right

Output Adjustment Dial

Nice, quality studio lights make your lighting easier right? I wish! In the last section I explained that your on-board or accessory flash will meter the scene and use the appropriate output for the exposure metering, not so with studio lights, at this point you are full manual.

On the flash will be an adjust dial to control the amount of light output. On the StrobeLites this goes from full power down to 1/4 power given you two stops of light output control. If you have a light meter and know how to use it, you have all the tools you need to get the shot right the first time. If you don’t have a light meter then you will need to continue reading.

Since I shoot with he same lights, in the same studio, with the same basic setup the vast majority of the time I know the basic light setup that will work without have to take too many test shots, I can usually get it dialed in within about three shots.  A key thing to note is that your meter in your camera is basically worthless at this point. You are going to want to shoot in manual mode otherwise the camera is going to try to adjust your settings for the metered light. In manual mode you have total control. So where should you start?

For most of my pictures I start with the following basic settings:

ISO: 200
f/Stop: 11
Shutter Speed: 1/200th second

In fact, those are the exact settings I used for the previous pictures in this article so far. Why these particular settings? For one, I like shooting at ISO 200, I like the results I get at that speed, f/11 is my normal aperture setting unless I am going for a particular depth of field effect. That leaves two ways to adjust the amount of light I need. I can either adjust the shutter speed or adjust the light output of the flash. You may think that you may want to go with a faster shutter speed to make sure you dont introduce any camera blur but in most cases you can’t shoot any faster than 1/200th or 1/250th depending on your lights/camera combination. With the PhotoBasics StrobeLites and a Canon 30D, I have never had an issue at 1/250th but I like the extra margin of safety of using 1/200th. Let’s take a look at what happens if you shoot faster.

Out of Sync Image

The image shown here was shot at 1/640th of a second, while this would be perfect safe if I was using the Canon 580 EX flash, the StrobeLites cannot sync with the camera at that speed so what happens is that the strobe went off too late causing the image to be partially cutoff by the closing of the shutter mechanism. Because of this issue we are limited to speeds of 1/200th or less so I usually will stick it at 1/200th and be done. That leaves adjust the light output higher if I need more light or using a lower output or a slower shutter speed if I need less light. Knowing that the only things I will need to adjust are my light output or shutter speed I have really reduced my possible settings from a handful down to basically one, and its either shutter speed or light output.

Since most of my shots are product shots, the lights are generally pretty close to the objects so I will start at a very low power output of the flash, if its too bright at the lowest setting and I am already at 1/200th of a second the only way to cut down on the light being captured is to move to a smaller aperture setting like f/22. If the light isn’t enough I can just reach up and dial in more light or use a slower shutter speed.

With a little practice and a handful of confidence, you will be getting your lighting dialed in within a few shots. Take your picture and then look at the histogram of the image on your LCD of your camera to double-check the exposure. If its too dark, bump up the light, if its clipped out, dial down the light. Nothing will beat just a bunch of practice with your own lights/camera/lenses/environment to get you familair with how your lighting setup will work the best and soon you too will be able to get it dialed in perfectly within just a few quick test shots.

Author: Kerry Garrison

What is white balance?
While we have another article that goes into more detail, let’s do a quick summary refresher about what white balance is. Light actually comes in different temperatures, measured in degrees Kelvin. Daylight and flash is typically around 5200 degrees which is considered to be neutral. Late afternoon/evening light and incandescent is warmer (more orange) and is usually around 6200 degrees, Fluorescent light is on the cooler side (around 3800 degrees) and has a greenish tint. While your camera will generally do a decent job of estimating the white balance, the problem is that the camera is measuring the white balance based on the reflected light on the subject. This method works alright most of the time but it is not going to be absolutely perfect, nor will it even be close under some conditions. A very common example of this is shooting a scene in the snow, this can really throw off the sensor and you can end up getting a blue color cast on your images. If you are shooting in RAW, you can easily compensate for poor white balance but this just adds to your workflow. If you are shooting in JPEG, this poor white balance makes it much harder to recover the scene without losing image quality.

Good Balance

Too Warm

Too Cool

Getting a good white balance
The best way to get a good white balance is measure the light temperature from the position of the subject towards the camera, while a camera is looking at the subject and can only measure reflective light and not direct light. Other methods for measuring white balance include placing an 18% grey card where the subject is and setting the white balance against that. While this is the most common method used by experienced photographers, the theory that you are still using reflected light instead of measuring the direct light.

Using the Colorright
To get the best results from the Colorright so put yourself in the position of the subject and aim your camera towards where the camera will be when you take the shot, place the Colorright disc over the lens and take your picture. Using the custom white balance settings on your camera, select the image to use as your white balance reference. Now go back to the camera position and you are ready to shoot. This should result in a perfect white balance since your camera measured the light from the light source and not a reflected light that can be altered by the reflective property of the subject.

If you cannot put the camera in the position of the subject, you can also use it by aiming it at the subject like you would use a gray card. While this may not be ideal, it is certainly far better than not having other means of getting a good white balance.

Results
The results are absolutely spot-on. While the design is very similar to the Expodisc, the difference with the Colorright is that is doesn’t allow light from all directions to hit the sensor, instead a smaller area ensures that the light hitting the sensor is exactly what you are looking for. The Colorright disc sells for $89, and the obvious question is “is it worth it?” Like many other things this depends on how many images you take and how much time you end up spending doing post correction. In some places you may only need to get a good white balance setting once or twice and you are good, in other places like weddings and receptions there can be several different locations that have radically different lighting and when you have to process hundreds of images from a place like that, the Colorright can pay for itself in post production time savings the first time you use it. If you shoot fewer or smaller events it may take longer for you to realize the benefit of getting your shots right in-camera versus processing the images later.

Website: http://colorright.com
Author: Kerry Garrison