Chapter 5
IN THIS CHAPTER
Exploring the White Balance feature and its effect on color
Creating custom White Balance settings
Choosing a color space (sRGB versus Adobe RGB)
Checking out Picture Control settings
Compared with understanding certain aspects of digital photography, making sense of your camera’s color options is relatively simple. First, when color problems occur, they’re often easy to fix by adjusting the camera's White Balance setting. Second, getting a grip on color requires learning only a few terms, an unusual state of affairs for an endeavor that often seems more like high-tech science than art. This chapter explains the White Balance setting along with other features that affect the way your camera renders colors.
Every light source emits a color cast. The fluorescent lights in certain restrooms, for example, put out a yellow-green light that makes everyone look sickly. Candlelight, on the other hand, produces a flattering warm glow.
When photographers talk about warm light and cool light, though, they aren’t referring to the position on the Kelvin scale — or at least not in the way most people think of temperatures, with a higher number indicating hotter temperatures. Instead, the terms describe the visual appearance of the light. Warm light, produced by candles and incandescent lights, falls in the red-to-yellow spectrum at the bottom of the Kelvin scale; cool light, in the blue spectrum, appears in the upper part of the Kelvin scale.
Most people don’t notice fluctuating colors of light because human eyes automatically compensate for them. Similarly, a digital camera compensates for different colors of light by using white balancing. Simply put, this feature neutralizes light so that whites are always white, which in turn ensures that other colors are rendered accurately.
When you stick with the camera’s default White Balance setting, things work out just fine in most cases. But if the scene is lit by two or more light sources that cast different colors, the White Balance system can become confused, producing an unwanted color cast. For example, the figurine shown in Figure 5-2 is ivory colored in real life. But at the default White Balance setting, which lets the camera control white balancing automatically, the figurine took on the yellow cast you see in the first shot in the figure. Changing the White Balance setting resulted in the accurate colors you see in the second photo.
The next section explains how to change the White Balance setting; following that, you can explore advanced options related to this feature. Unfortunately, you can’t access the White Balance setting when you set the Shooting mode to Auto. You have to use the P, S, A, or M Shooting mode.
You can view the primary White Balance setting in the default monitor display, the Information display, and the default viewfinder display, as shown in Figure 5-3. In the figure, the default setting, A1, is selected; it’s one of four — that’s right, four — automatic White Balance settings on the Z fc.
Again, you can control the White Balance setting only in the P, S, A, and M Shooting modes. To access the setting, use any of these techniques:
i menu: Highlight the White Balance symbol, as shown on the left in Figure 5-4, and press OK to display available settings on a separate screen, as shown on the right. If a Details box appears, as shown in the figure, tap the box or press the Multi Selector down to access secondary options. For example, for the Fluorescent setting, you can choose from three bulb types. I detail these secondary settings a bit later in this section. If the screen instead displays an Adjust box, tapping that box or pressing the Multi Selector down leads to the fine-tuning tool that I explain in the next section.
To see all settings on the same screen as the i menu, highlight the White Balance symbol and then rotate the Main command dial to choose a setting. If you select a setting that has secondary options, rotate the Sub-command dial to choose the one you want to use.
Photo Shooting menu/Video Recording menu: For still photography, open the Photo Shooting menu and choose White Balance. For video color control, use the Video Recording menu. If you see a right-pointing triangle next to a setting, press the Multi Selector right to access the secondary options for that setting. If you see an Adjust symbol at the bottom of the screen, tap it or press the Multi Selector right to open the fine-tuning controls.
The Video Recording menu offers a setting not available via the i menu: Same as Photo Settings. When that option is selected, as it is by default, the camera uses your still photography White Balance setting when you switch to video recording. Any other setting you choose from the Video Recording menu affects only video recording.
Function (Fn) button plus Main command dial: At the camera’s default settings, pressing and holding the Fn (Function) button (labeled in Figure 5-5) displays the White Balance settings without the i menu, as shown on the right in the figure. While holding down the button, rotate the Main command dial to select a setting and then rotate the Sub-command dial to select any secondary options. You can’t access the fine-tuning tool when you use this method.
I dislike this setup because my index finger seems to naturally fall over the Fn button when I grip the camera. As a result, I often display the White Balance options accidentally. If you also find this feature annoying, see Chapter 10 to find out how to assign the Fn button another shooting function or to disable it altogether.
White Balance settings are represented in the displays by the symbols shown in the following list, which details each setting:
Incandescent: If you use incandescent lighting and the Auto 0, 1, or 2 settings fail you, try this setting. It assumes a bulb color temperature of 3000K.
Most light-bulb packaging states the color temperature if you’re unsure of where the lights fall on the Kelvin scale.
K (Choose Color Temperature): If you use lights that have a specific Kelvin temperature not addressed by one of the other settings, select this option and dial in the temperature manually. The default setting is 5000K; you can set the value as low as 2500K and as high as 10000K.
When you choose the K setting — K is for Kelvin — from the i menu, you see the controls shown in Figure 5-6. Change the Kelvin value using the options in the box that’s highlighted in the figure; the other half of the screen is for fine-tuning the setting, as outlined in the next section. Unfortunately, the controls obscure a good portion of the live preview, but you can still see how your change to the Kelvin value affects colors.
In the P, S, A, and M Shooting modes, you can modify the results produced by any White Balance setting. For example, if Cloudy renders colors a bit too warm, you can alter the setting so that it produces slightly cooler tones.
The following steps show you how to fine-tune all White Balance settings except K and PRE (Preset). The steps involve using the i menu; it’s my preferred method because you can see colors update in the previews as you make adjustments:
Open the i menu, highlight the White Balance symbol, and press OK.
Or just tap the White Balance symbol on the i menu.
For the Fluorescent and Auto (A0, A1, and A2) White Balance settings only, tap Details or press the Multi Selector down.
On the screen that appears, select a specific fluorescent bulb or choose the Auto version you want to use. On the left screen in Figure 5-7, I selected the Day White Fluorescent bulb, for example.
Tap the Adjust symbol at the bottom of the screen or press the Multi Selector down.
You see a color grid like the one shown on the right in Figure 5-7. The grid is set up around two color pairs: Green and Magenta, represented by G and M; and Blue and Amber, represented by B and A.
Move the black square labeled color shift marker in Figure 5-7 in the direction you want to shift colors.
You can either tap inside the grid, tap the arrows on the sides of the grid, or use the Multi Selector to reposition the marker.
As you move the marker, the numbers above the grid indicate the current amount of color shift. In Figure 5-7, for example, the numbers indicate a shift of 1.0 toward amber and a shift of 1.75 toward magenta. A value of 0 indicates no adjustment.
With traditional colored lens filters, the density of a filter determines the degree of correction it provides. Filters are assigned a density rating using a unit of measurement known as a mired (pronounced “my-red”). The White Balance grid is designed around this system: A value of 1.0 equals a five-mired shift.
You also can access the fine-tuning tool from the Photo Shooting menu or the Video Recording menu. Just select a White Balance setting, choose any secondary option that’s presented (such as the type of fluorescent bulb), and then tap Adjust or press the Multi Selector right to open the color adjustment grid. The only exception is the PRE setting: For this White Balance setting, the menu route involves a few other details; I spell those out in the next section.
This technique requires taking a reference photo of a gray card, which is a piece of neutral card stock. You can buy gray cards (or equivalent materials) in many camera stores for less than $20.
Follow these steps to record a preset:
Set the Shooting mode to P, S, A, or M.
As with all white balance features, you can take advantage of this one only in these Shooting modes.
Check exposure and adjust settings if needed.
This process doesn’t work if your settings produce an underexposed or overexposed shot of the reference card.
Press the i button to display the i menu. Then highlight the White Balance setting.
Refer to Figure 5-4 if you need help locating the setting on the menu.
Highlight the preset number (d-1 through d-6) you want to assign to the custom White Balance setting.
If you select an existing preset, it will be overwritten by the new preset.
Press the OK button or tap the OK symbol.
You return to the screen shown on the left in Figure 5-8. The PRE symbol should still be highlighted; if it isn’t, use the Multi Selector to highlight it again.
Press and hold the OK button until the i menu disappears and you see the symbols shown in Figure 5-9.
The letters PRE and the preset number you chose flash in the upper right corner, and a target frame appears in the center of the display.
Frame your shot so that the gray card is under the target frame.
If you’re not using flash, you can reposition the target frame by using the Multi Selector. When a flash is attached and turned on, just compose the reference shot with the gray card at the center of the frame.
Press and release the OK button or press the shutter button all the way down to take the reference picture.
If the camera successfully records the preset, you see the message Data acquired. If something went awry, you see a message asking you to try again. (Remember that the reference card shot must be properly exposed for the camera to create the preset successfully.)
Here’s another quick trick: If you leave the Fn (Function) button on the front of the camera set to its default task, which is to display the White Balance selection screen, you can use that button to quickly launch into recording a new preset, too. Press and hold the Fn button while rotating the Main command dial to choose PRE as the White Balance setting. Release the button and then press and hold it down until the preset measurement screen appears. Then take the reference picture by pressing and releasing the OK button or by pressing the shutter button all the way. Again, though, this technique allows you to overwrite only the current preset (d-1, d-2, and so on). And if you can remember that this option exists, kudos to you because it’s way too much for my limited memory bank.
At any rate, after you create a new preset, the camera automatically selects it as the current White Balance setting. To use a different preset, see the upcoming section “Selecting the preset you want to use.” For details on how to fine-tune a preset, skip to the later section “Editing presets.”
Suppose that you’re the marketing manager for a small business and one of your jobs is to shoot portraits of the company bigwigs for the annual report. You build a small studio just for that purpose, complete with photo lights and a conservative beige backdrop. The bigwigs can’t all show up to get their pictures taken on the same day, but you have to make sure that the colors in that backdrop remain consistent for each shot, no matter how much time passes between photo sessions. This scenario is one possible reason for creating a preset based on an existing photo. After photographing the first subject, you use that file as a reference when creating a new preset.
To create a preset based on a photo, the photo must be stored on the memory card that’s in the camera. If the photo isn’t on the card, use a card reader to copy it from its current storage location to the card. When viewing the card contents on your computer, you should see a main folder named DCIM; open that folder to view the camera-created folders. By default, the first folder created by the camera carries the label 100NZ_FC. Copy the reference photo to that folder.
After putting the reference photo on the card, put the card back in the camera and follow these steps:
Open the Photo Shooting menu or the Video Recording menu.
It doesn’t matter which menu you choose; a preset you create via one menu is available from the other.
Choose White Balance, select PRE (Preset Manual) and press the Multi Selector right.
You see the screen shown on the left in Figure 5-10.
Use the Multi Selector to select the number of the preset you want to create (d-1 through d-6).
If you already created a preset, choosing its number will overwrite that preset with the new one. In the figure, d-1 holds the preset I created using a gray card, as outlined in the preceding section, so I selected d-2 to hold the new preset.
Highlight Select Picture and press the Multi Selector right.
You see thumbnails of your photos.
Use the Multi Selector to move the yellow selection box over your reference photo. Then press OK.
The menu screen shown on the right in Figure 5-10 reappears.
Press the OK button or tap the OK Done symbol.
You return to the screen showing the White Balance preset thumbnails. The thumbnail for the photo you selected appears as the thumbnail for the preset you chose in Step 3.
After you take these steps, the White Balance setting automatically changes to use the new preset.
If you create multiple presets and you know the number of the one you want to use (d-1, d-2, and so on), take either of these approaches to select the one you want to use:
Both methods assume that you remember the number of the preset you want to use. If you’re not sure on that score, take this alternative approach: Open the Photo Shooting menu or Video Recording menu, choose White Balance, and then highlight PRE. Press the Multi Selector right to display a screen that contains thumbnails of each preset, as shown on the left in Figure 5-10. Use the Multi Selector to highlight a preset. Then press the OK button or tap the OK symbol.
After creating a preset, the only way to get rid of it is to overwrite it with a new one. However, you can edit a preset in a few ways.
To access the editing features, choose White Balance from either the Photo Shooting or Video Recording menu. Select PRE (Preset Manual), press the Multi Selector right, and move the yellow frame over the preset you want to edit.
Next, press the Zoom In button or tap the Select symbol at the bottom of the screen. You then see the editing screen, shown on the left in Figure 5-11.
Here’s what you can accomplish with each menu option:
Edit comment: This option enables you to name a preset. After highlighting Edit Comment, press the Multi Selector right to display the text entry screen shown on the right in Figure 5-11. Use these techniques to create your text:
Enter a character: Tap a character on the keyboard or use the Multi Selector to highlight a character and then press the OK button, or tap OK Input. The characters appear in the text box at the top of the screen. Your comment can be up to 36 characters long.
To cycle from the keyboard shown in the figure to screens that contain uppercase characters and symbols, select the Aa& key; select the empty box just to the left of that key to enter a space. I labeled both keys in Figure 5-11.
After you enter your text, press the Zoom In button or tap the OK symbol that sports the Zoom In icon (the magnifying glass). You return to the screen shown on the left in Figure 5-11, but your text now appears at the bottom of the page.
To exit the editing screen (the left screen in Figure 5-11), tap OK Done or press the OK button. You see the Preset Manual selection screen again; if you entered a text comment, it appears at the bottom of the screen, as shown in Figure 5-12. To exit that screen, tap OK or press the OK button. To exit the menus and return to shooting, press the Menu button twice or just give the shutter button a quick half-press and release.
By default, your camera captures photographs in the sRGB color space, which refers to an industry standard spectrum of colors. (The s is for standard, and the RGB is for red, green, blue — which are the primary colors in the digital color world.) This color space was created to help ensure color consistency as an image moves from camera or scanner to monitor and printer. The idea was to create a spectrum of colors that all devices can reproduce.
Because sRGB excludes some colors that can be reproduced in print and onscreen by some devices, your camera also enables you to shoot photos in the Adobe RGB color space, which contains a larger spectrum of colors. Tell the camera which color space you prefer via the Color Space option on the Photo Shooting menu, as shown in Figure 5-13. (Videos always use sRGB.)
Although choosing a larger color spectrum sounds like a no-brainer, Adobe RGB isn't necessarily the right choice. In fact, I suggest that you stick with sRGB unless you have a specific need to go with Adobe RGB. Most home and office printers, photo programs, web browsers, and mobile devices are designed around sRGB, as are the photo printers used by retail outlets and online printing services. Speaking of printers, certain Adobe RGB colors can’t be reproduced in print. The printer substitutes the closest printable color, if necessary.
Additionally, to retain Adobe RGB colors when you edit your photos, your software must support that color space. You also need to use specific editing and print settings to avoid mucking up the color works. In digital imaging terms, you need to study the subject known in the biz as color management.
The Picture Control setting comes into play when you shoot videos or capture photos using the JPEG Image Quality settings, detailed in Chapter 2. Your choice affects color saturation, increasing or decreasing the intensity of all colors in a scene or just a few specific colors, such as blues and greens. The setting affects more than color, though; it also tweaks contrast and sharpening.
For photos you shoot in the Raw format, the camera uses your chosen Picture Control setting only to produce the image you see during playback. When you process the Raw file, you can apply any Picture Control setting, although the one that was selected when you took the picture is used initially.
A symbol representing the Picture Control setting appears in the default monitor display, the Information display, and the viewfinder, as shown in Figure 5-14. The initial (or initials) after the symbol indicates the current setting. In the figure, the letter A means that the Auto Picture Control setting is in force.
When the camera is set to the Auto Shooting mode, you have no say over which Picture Control setting is used. But in the P, S, A, and M Shooting modes, you can choose from these settings:
Monochrome (MC): This setting creates a black-and-white photo. However, I suggest that you instead shoot in color and then create a black-and-white copy using your photo software. Good photo programs have tools that let you choose how original tones are translated to the black-and-white palette, usually resulting in a better image than one produced by the Monochrome Picture Control.
If you need a black-and-white image quickly, though, there’s a way to have your cake and eat it too. Just choose an Image Quality setting that delivers both a JPEG and a Raw version of a photo. (Chapter 2 explains how.) The JPEG version is created using the Monochrome Picture Control, so it’s set in stone as a monochrome image — you can’t restore the original image colors. But when you process the Raw version, a topic I cover in Chapter 9, you can apply one of the color Picture Controls to produce a full-color image.
As another solution, you can turn any color image, whether captured in the Raw or JPEG format, into a monochrome copy by using the Monochrome tool on the Retouch menu, as detailed in Chapter 11.
For videos, setting the Picture Control to Monochrome is a way to produce an instant film noire look. There is no in-camera solution that enables you to create both a color and black-and-white version of a video, unfortunately. If you think you may need a color version one day, shoot in color and use the filters used in many video-editing programs to create a black-and-white copy.
Creative Picture Control (C plus a number ranging from 1 to 20): Choose this option to access 20 more picture styles that Nikon categorizes as creative. I, however, will come right out and say that I think they’re lame. Most simply add a slight color tint to the image, although some either soften or sharpen focus at the same time. A few provide different variations of a black-and-white photo.
The advice I gave earlier for the Monochrome Picture Control applies here as well: Go ahead and play around with these settings, if you like, but remember that you can’t return to a nonstylized version of a JPEG photo or a video if you shoot it with a Creative Picture Control in force.
Obviously, the Monochrome and black-and-white Creative Picture Control options produce a drastic change in the look of your image. The extent to which other settings affect an image depends on the subject, but to give you a general idea, the first seven photos in Figure 5-15 show the same scene as rendered by the “normal” Picture Controls. As you can see, there’s not a huge difference between the variations, although the Flat setting definitely leads to a washed-out, soft image, whereas the straw behind the decorations looks significantly sharper in the Landscape version than in the Portrait version. For the last example, I applied the Blue Creative Picture Control, which pretty much sucked out most colors except blues. My astute artistic judgment of that result is a hearty “meh.”
If you want to experiment with Picture Controls, here are the basics:
Changing the Picture Control setting: Your best option is to highlight the setting on the i menu, as shown on the left in Figure 5-16, and then press the OK button, which displays a scrolling list of Picture Controls over the live preview, as shown on the right. Press the Multi Selector right or left to scroll the settings and see how each one affects the scene. Press OK to exit the selection screen.
You also can access the setting via either the Photo Shooting or Video Recording menu, but you don’t get the benefit of seeing the live preview.
To reserve page space in this book for functions that will be the most useful to the most readers, this discussion is the extent of the Picture Control information in this book. For more details, check out the camera’s user guide. You can download an electronic version of the guide from the Nikon website.