Choosing the Right ISO Sensitivity Setting

Modern digital cameras allow you to select the ISO value for each situation using a dial or a button. This is a great advantage over analog photography, which requires either a film change or special development in order to alter the sensitivity base. Figure 1-22 Detail of the same subject shot at ISO 6400 Figure 1-22 Detail of the same subject shot at ISO 6400 > Always select the lowest possible ISO setting and use a tripod whenever you can. Generally, the lower your ISO value, the less...

Using White Balance Settings to Produce Optimum Color Quality

White balance (WB) settings are the key to correct color reproduction. They have to allow for direct and indirect (reflected) light sources. Analog photographers adjust white balance either by changing the film they use or by attaching colored filters to the camera lens. This compensates for differing lighting conditions (indoors, outdoors, cloudy sky, flash, etc.). If you shoot in RAW format, you can adjust white balance later during processing. Fine art photographers are not necessarily...

Adobe Camera Raw ACR

> ACR 5.x only works with Photoshop CS4 or Photoshop Elements 5 and later. ACR 6 only works with Photoshop CS5. * A list of all supported cameras can be found at www.adobe.com products photoshop cameraraw.html. Adobe Camera Raw (ACR for short) is Adobe's own RAW converter and has been included with Photoshop since CSi was released. It is probably the most widely used RAW converter on today's market. It is fast and effective, and produces great results for a broad range of camera models. The...

Multi Core Processing

> Photoshop has supported some multi-core processors since the release of CS. Lightroom uses separate processes for importing and exporting images, and for generating image previews - an indicator in the main program window then tells you which background processes are currently in progress. We would like to see more multiprocessors support in future. Figure 5-22 ACR includes a number of Auto corrections. Figure 5-22 ACR includes a number of Auto corrections. Since early 2006, nearly all new...

Other Useful Features

Many of the correction tools that used to be the exclusive preserve of Photoshop or image processing plug-ins are now an integral part of today's RAW converters. You will have to decide for yourself whether these are useful to your own personal workflow, but you can always simply ignore them if they are not what you need. If you intend to convert your RAW images to 8-bit JPEG rather than to 16-bit TIFF, editing the RAW version will usually lead to less image quality loss than if you correct...

Fine Tuning an Image Using Photoshop

Here, we perform the image optimization steps that are either not possible using our RAW editor, or that are simpler to perform (or produce better results) using a conventional image processor or specialized plug-ins. Appropriate plug-ins are PTLens 92 for correcting lens distortion, Viveza for performing non-destructive color corrections, and a range of Uwe Stein-mueller's scripts for sharpening (EasyS Plus), for improving local contrast (DOP_EasyD_Plus_DetailResolver) or for reducing the...

The Digital Light

Sorting your images is an important and often unpopular task, especially if you are itching to get to work on your latest images. The thumbnails displayed in many file browsers are usually not of high enough quality to be used for judging overall image quality. The fact that we will be working mostly with RAW files means that our digital light box has to have an associated or built-in RAW editor that can display the full, high-resolution image contained in the RAW data. When you are sorting...

Setting your Monitor profile

Photoshop is not particularly intuitive when it comes to finding the current monitor profile. The following methods are the simplest that we know Windows XP Right-click on the desktop and select Properties. Select the Settings tab in the dialog that appears and click the Advanced button. Selecting the Color Management tab then displays a dialog containing all installed monitor profiles. The currently active profile is highlighted see figure 3-29 for the Windows XP version . Here, you can add...

Color Temperature and

You can manipulate color temperature at various stages by using your RAW editor or the camera's white balance settings. The term color temperature defines the composition of the light at a device's white point i.e., the composition of light emitted by an ideal light source at a specific temperature and is stated in Kelvin units K . Contrary to our normal color perception, the higher the color temperature of a light source, the more blue components it will have. Conversely, the lower a light's...

Profiling Your Printer

Most printer profiling packages offer several different print targets. The more color fields a target provides, the more precise your profile will be. However, this also involves more effort. Some profiling devices such as DTP-41, DTP-70, or iliO by X-Rite 52 can read printed targets automatically, but these are usually prohibitively expensive for most photographers. A standard spectrophotometer and ruler like those provided with the ilXTrme kit by X-Rite is usually sufficient for producing...

Gamut Warning

QM amp J gt 94S .Hunintingbird.TIF .1 24,2 KC S U.S. WeL CuhL lI tSWOP v2 O xOl. QM amp J gt 94S .Hunintingbird.TIF .1 24,2 KC S U.S. WeL CuhL lI tSWOP v2 Image displayed with Gamut warning active. is set up as the warning color and U.S. Web Coated SWOP V2 as the destination profile. Image displayed with Gamut warning active. is set up as the warning color and U.S. Web Coated SWOP V2 as the destination profile. If you don't use a custom proof setup in Photoshop and activate Gamut Warning...

The CMYK Color Model

The CMYK color model uses four primary colors to define a color cyan C , magenta M , yellow Y , and black K . CMYK was designed for printing, where incoming light is reflected by the print. CMYK is a subtractive color model, as each of the colored inks absorbs subtracts a certain component of the incident light. Figure 3-3 shows that mixing cyan and magenta gives you blue, and when you add magenta to yellow you get red. In theory, the combination of the colors C, M, and Y alone should be...

Visualizing Color Spaces

Profilemaker Creating Monitor Profile

Color spaces are actually three-dimensional. The profile shown in figure 3-7 is sRGB, illustrated using the Color-Sync utility in Mac OS X. Windows XP has a similar utility, called MS Color Control Panel, that is available for free download 97 . In figure 3-7, the gray shape shows the Adobe RGB 1998 gamut as a comparison. The printing industry also uses 2D charts to display color spaces. The color space plot shown in figure 3-8 was generated using the X-Rite ProfileMaker Pro Profile Editor. BC...

Raw Jpeg and TIFF Processing

Compress to mini JPEG and save as RAW file Download image files to computer, rename and tag Interpolate color resample with new white balance Interpolate color resample with new white balance Reduce to 8-bit color depth and convert color space Download image files to computer, renaming tagging Figure 2-6 Comparison of a RAW and a JPEG TIFF workflow. The RAW workflow generally comprises fewer Photoshop optimization steps than the illustration infers, but the borders between the two processing...

Our File and Folder Naming Conventions

Figure 1-24 illustrates the system we use for naming files and folders. This system is chronological and is built on two or three levels. We use one folder for each year, and the folder's name always includes the year. The year folders contain subfolders organized according to shoots. If we use only one camera, all the images from a shoot are stored in a single subfolder. If we use multiple cameras for a shoot, the images from each camera are stored in a separate subfolder. Our system for...

Using Histograms as an Exposure

Correct exposure is the key to great photos. Overexposure should be avoided at all costs, as washed-out highlight detail cannot be recovered at any stage during the workflow. In order to help you judge exposure, digital cameras allow you to check your exposure visually on the monitor immediately after shooting. Nearly all digital cameras - at least all DSLR cameras - have a histogram display that shows the distribution of tonal values within the image from 0 black, on the left to 255 white, on...