Creative Adobe Suite 5 Manual
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57CREATIVE SUITE 5Camera Raw Last updated 11/16/2011 When you click Auto at the top of the tone controls section of the Basic tab, Camera Raw analyzes the camera raw image and makes automatic adjustments to the tone controls (Exposure, Recovery, Fill Light, Blacks, Brightness, and Contrast). You can also apply automatic settings separately for individual tone controls. To apply an automatic adjustment to an individual tone control, such as Exposure or Recovery, press Shift and double-click the slider. To return an individual tone control to its original value, double-click its slider. When you adjust tone automatically, Camera Raw ignores any adjustments previously made in other tabs (such as fine- tuning of tone in the Tone Curves tab). For this reason, you should usually apply automatic tone adjustments first—if at all—to get an initial approximation of the best settings for your image. If you are careful during shooting and have deliberately shot with different exposures, you probably don’t want to undo that work by applying automatic tone adjustments. On the other hand, you can always try clicking Auto and then undo the adjustments if you don’t like them. Previews in Adobe Bridge use the default image settings. If you want the default image settings to include automatic tone adjustments, select Apply Auto Tone Adjustments in the Default Image Settings section of the Camera Raw preferences. Note: If you are comparing images based on their previews in Adobe Bridge, you may want to leave the Apply Auto Tone Adjustments preference deselected, which is the default. Otherwise, you’ll be comparing images that have already been adjusted. As you make adjustments, keep an eye on the end points of the histogram, or use the shadow and highlight clipping previews. While moving the Exposure, Recovery, or Blacks slider, hold down Alt (Windows) or Option (Mac OS) to preview where highlights or shadows are clipped. Move the slider until clipping begins, and then reverse the adjustment slightly. (For more information, see “Preview highlight and shadow clipping” on page 55.) To manually adjust a tone control, drag the slider, type a number in the box, or select the value in the box and press the Up or Down Arrow key. To reset a value to its default, double-click the slider control. Exposure Adjusts the overall image brightness, with a greater effect in the highlights. Decrease Exposure to darken the image; increase Exposure to brighten the image. The values are in increments equivalent to f-stops. An adjustment of +1.50 is like widening the aperture 1-1/2 stops. Similarly, an adjustment of -1.50 is like reducing the aperture 1-1/2 stops. (Use Recovery to bring highlight values down.) Recovery Attempts to recover details from highlights. Camera Raw can reconstruct some details from areas in which one or two color channels are clipped to white. Fill Light Attempts to recover details from shadows, without brightening blacks. Camera Raw can reconstruct some details from areas in which one or two color channels are clipped to black. Using Fill Light is like using the shadows portion of the Photoshop Shadow/Highlight filter or the After Effects Shadow/Highlight effect. Blacks Specifies which input levels are mapped to black in the final image. Increasing Blacks expands the areas that are mapped to black. This sometimes creates the impression of increased contrast in the image. The greatest change is in the shadows, with much less change in the midtones and highlights. Using the Blacks slider is like using the black point slider for input levels when using the Photoshop Levels command or the After Effects Levels effect. Brightness Adjusts the brightness or darkness of the image, much as the Exposure property does. However, instead of clipping the image in the highlights or shadows, Brightness compresses the highlights and expands the shadows when you move the slider to the right. Often, the best way to use this control is to set the overall tonal scale by first setting Exposure, Recovery, and Blacks; then set Brightness. Large Brightness adjustments can affect shadow or highlight clipping, so you may want to readjust the Exposure, Recovery, or Blacks property after adjusting Brightness.
58CREATIVE SUITE 5Camera Raw Last updated 11/16/2011 Contrast Increases or decreases image contrast, mainly affecting midtones. When you increase contrast, the middle- to-dark image areas become darker, and the middle-to-light image areas become lighter. Generally, you use the Contrast property to adjust the contrast of the midtones after setting the Exposure, Blacks, and Brightness values. Fine-tune tone curves Use the controls in the Tone Curve tab to fine-tune images after you’ve made tone adjustments in the Basic tab. The tone curves represent changes made to the tonal scale of an image. The horizontal axis represents the original tone values of the image (input values), with black on the left and progressively lighter values toward the right. The vertical axis represents the changed tone values (output values), with black on the bottom and progressing to white at the top. If a point on the curve moves up, the output is a lighter tone; if it moves down, the output is a darker tone. A straight, 45-degree line indicates no changes to the tone response curve: the original input values exactly match the output values. Use the tone curve in the nested Parametric tab to adjust the values in specific tonal ranges in the image. The areas of the curve affected by the region properties (Highlights, Lights, Darks, or Shadows) depend on where you set the split controls at the bottom of the graph. The middle region properties (Darks and Lights) mostly affect the middle region of the curve. The Highlight and Shadows properties mostly affect the ends of the tonal range. ❖To adjust tone curves, do any of the following: Drag the Highlights, Lights, Darks, or Shadows slider in the nested Parametric tab. You can expand or contract the curve regions that the sliders affect by dragging the region divider controls along the horizontal axis of the graph. Drag a point on the curve in the nested Point tab. As you drag the point, the Input and Output tonal values are displayed beneath the tone curve. Choose an option from the Curve menu in the nested Point tab. The setting you choose is reflected in the Point tab, but not in the settings in the Parametric tab. Medium Contrast is the default setting. Select the Parametric Curve Targeted Adjustment tool in the toolbar and drag in the image. The Parametric Curve Targeted Adjustment tool adjusts the Highlights, Lights, Darks, or Shadows curve region based on the values in the image where you click. Note: The Targeted Adjustment tool does not affect point curves. Clarity, Vibrance, and Saturation controls You can change the color saturation (vividness or color purity) of all colors by adjusting the Clarity, Vibrance, and Saturation controls on the Basic tab. (To adjust saturation for a specific range of colors, use the controls on the HSL / Grayscale tab.) Clarity Adds depth to an image by increasing local contrast, with greatest effect on the midtones. This setting is like a large-radius unsharp mask. When using this setting, it is best to zoom in to 100% or greater. To maximize the effect, increase the setting until you see halos near the edge details of the image and then reduce the setting slightly. Vibrance Adjusts the saturation so that clipping is minimized as colors approach full saturation. This setting changes the saturation of all lower-saturated colors with less effect on the higher-saturated colors. Vibrance also prevents skin tones from becoming oversaturated. Saturation Adjusts the saturation of all image colors equally from -100 (monochrome) to +100 (double the saturation).
59CREATIVE SUITE 5Camera Raw Last updated 11/16/2011 HSL / Grayscale controls You can use the controls in the HSL / Grayscale tab to adjust individual color ranges. For example, if a red object looks too vivid and distracting, you can decrease the Reds values in the nested Saturation tab. The following nested tabs contain controls for adjusting a color component for a specific color range: Hue Changes the color. For example, you can change a blue sky (and all other blue objects) from cyan to purple. Saturation Changes the color vividness or purity of the color. For example, you can change a blue sky from gray to highly saturated blue. Luminance Changes the brightness of the color range. If you select Convert To Grayscale, you see only one nested tab: Grayscale Mix Use controls in this tab to specify the contribution of each color range to the grayscale version of the image. Adjust color or tone using the Targeted Adjustment tool The Targeted Adjustment tool , sometimes called the “TAT tool,” allows you to make tonal and color corrections by dragging directly on a photo, rather than by using sliders in the image adjustment tabs. For some people, dragging on the image is a more intuitive way to work. Using the Targeted Adjustment tool, you can drag down on a blue sky to desaturate it, for example, or drag up on a red jacket to intensify its hue. 1To make color adjustments with the Targeted Adjustment tool , click it in the toolbar and choose the type of correction you want to make: Hue, Saturation, Luminance, or Grayscale Mix. Then, drag in the image. Dragging up or right increases values; dragging down or left decreases values. Sliders for more than one color may be affected when you drag with the Targeted Adjustment tool. Selecting the Grayscale Mix Targeted Adjustment tool converts the image to grayscale. 2To make tone curve adjustments using the Targeted Adjustment tool , click it in the toolbar and choose Parametric Curve. Then, drag in the image. The Parametric Curve Targeted Adjustment tool adjusts the Highlights, Lights, Darks, or Shadows curve region based on the values in the image where you click. The keyboard shortcut T toggles the last Targeted Adjustment tool you used. Tone a grayscale image Use the controls in the Split Toning tab to color a grayscale image. You can add one color throughout the tonal range, such as a sepia appearance, or create a split tone result, in which a different color is applied to the shadows and the highlights. The extreme shadows and highlights remain black and white. You can also apply special treatments, such as a cross-processed look, to a color image. 1Select a grayscale image. (It can be an image that you converted to grayscale by selecting Convert To Grayscale in the HSL / Grayscale tab.) 2In the Split Toning tab, adjust the Hue and Saturation properties for the highlights and shadows. Hue sets the color of the tone; Saturation sets the magnitude of the result. 3Adjust the Balance control to balance the influence between the Highlight and Shadow controls. Positive values increase the influence of the Highlight controls; negative values increase the influence of the Shadow controls.
60CREATIVE SUITE 5Camera Raw Last updated 11/16/2011 Adjust color rendering for your camera in Camera Raw For each camera model it supports, Camera Raw uses color profiles to process raw images. These profiles are produced by photographing color targets under standardized lighting conditions and are not ICC color profiles. ACR version These profiles are compatible with older versions of Camera Raw and Lightroom. The version corresponds to the version of Camera Raw in which the profile first appeared. ACR profiles offer consistent behavior with legacy photos. Adobe Standard Standard profiles significantly improve color rendering, especially in warm tones such as reds, yellows, and oranges, from earlier Adobe camera profiles. Camera Matching Camera Matching profiles attempt to match the camera manufacturer’s color appearance under specific settings. Use Camera Matching profiles if you prefer the color rendering offered by your camera manufacturer’s software. Both Adobe Standard and Camera Matching camera profiles are intended to serve as a starting point for further image adjustments. Therefore, use the profiles in conjunction with the color and tone controls in the Basic, Tone Curve, HSL / Grayscale, and other image adjustment tabs. To manually install camera profiles, place them in the following locations: Windows XP C:\Documents and Settings\All Users\Application Data\Adobe\CameraRaw\CameraProfiles Windows Vista C:\ProgramData\Adobe\CameraRaw\CameraProfiles Windows 7 C:\ProgramData\Adobe\CameraRaw\CameraProfiles Mac OS /Library/Application Support/Adobe/CameraRaw/CameraProfiles Apply a camera profile ❖To apply a camera profile, select it from the Camera Profile pop-up menu in the Camera Calibration tab of the Camera Raw dialog box. The Adobe Standard profile for a camera is named Adobe Standard. Camera Matching profiles include the prefix Camera in the profile name. The Camera Profile pop-up menu displays only profiles for your camera. If the only profile in the Camera Profile menu is Embedded, it means that you have selected a TIFF or JPEG image. Adobe Standard and Camera Matching profiles work only with raw images. Note: If you have selected a raw file and Adobe Standard and Camera Matching profiles do not appear in the Camera Profile pop-up menu, download the latest Camera Raw update from the Digital camera raw file support page. Specify a default camera profile 1Select a profile from the Camera Profile pop-up menu in the Camera Calibration tab of the Camera Raw dialog box. 2Click the Camera Raw Settings menu button and choose Save New Camera Raw Defaults from the menu. Apply a profile to a group of images 1Select the images in the Filmstrip. 2Choose a profile from the Camera Profile pop-up menu in the Camera Calibration tab of the Camera Raw dialog box. 3Click the Synchronize button. 4In the Synchronize dialog box, choose Synchronize > Camera Calibration, and then click OK.
61CREATIVE SUITE 5Camera Raw Last updated 11/16/2011 Create a camera profile preset If you find yourself often applying the same profile, you can work more efficiently by creating and applying a preset. 1Choose a profile from the Camera Profile pop-up menu in the Camera Calibration tab of the Camera Raw dialog box. 2Click the Camera Raw Settings menu button and choose Save Settings from the menu. 3In the Save Settings dialog box, choose Subset > Camera Calibration, and then click OK. 4Name your preset and click Save. 5To apply the preset to a group of images, select the images and then choose Apply Preset > Preset Name from the Camera Raw Settings menu. Customize profiles using the DNG Profile Editor To improve color rendering or customize a camera profile, use the standalone DNG Profile Editor utility. For example, use the DNG Profile Editor to correct an unwanted color cast in a profile or to optimize colors for a specific application, such as studio portraits or fall foliage. The DNG Profile Editor and documentation for it are available on Adobe Labs. Important: Leave the Camera Calibration tab sliders set to 0 when adjusting camera profiles with the DNG Profile Editor. More Help topics “Save, reset, and load Camera Raw settings” on page 73 “Apply saved Camera Raw settings” on page 74 Rotate, crop, and retouch images in Camera Raw Rotate images Click the Rotate Image 90° Counter Clockwise button (or press L). Click the Rotate Image 90° Clockwise button (or press R). Note: Using commands in the Edit menu, you can also rotate images in Adobe Bridge without opening the Camera Raw dialog box. Straighten images 1In the Camera Raw dialog box, select the Straighten tool (or press A). 2Drag the Straighten tool in the preview image to establish what’s horizontal or vertical. Note: The Crop tool is active immediately after you use the Straighten tool. Crop images 1In the Camera Raw dialog box, select the Crop tool (or press C).
62CREATIVE SUITE 5Camera Raw Last updated 11/16/2011 To constrain the initial crop area to a specific aspect ratio, hold the mouse button down as you select the Crop tool and choose an option from the menu. To apply a constraint to a previously applied crop, Ctrl-click (Mac OS) or right- click (Windows) on the crop. 2Drag in the preview image to draw the crop area box. 3To move, scale, or rotate the crop area, drag the crop area or its handles. Note: To cancel the crop operation, press Esc with the Crop tool active, or click and hold the Crop tool button and choose Clear Crop from the menu. To cancel the crop and close the Camera Raw dialog box without processing the camera raw image file, click the Cancel button or deselect the Crop tool and press Esc. 4When you are satisfied with the crop, press Enter (Windows) or Return (Mac OS). The cropped image resizes to fill the preview area, and the workflow options link under the preview area displays the updated image size and dimensions. Remove red-eye 1Zoom the image in to at least 100%. 2In the toolbar, select the Red Eye Removal tool (or press E). 3Drag a selection in the photo around the red eye. Camera Raw sizes the selection to match the pupil. You can adjust the size of the selection by dragging its edges. 4In the tool options under the Histogram, drag the Pupil Size slider to the right to increase the size of the area corrected. 5Drag the Darken slider to the right to darken the pupil area within the selection and the iris area outside the selection. Deselect Show Overlay to turn off the selection and check your correction. Note: Move between multiple selected red eye areas by clicking the selection. Remove spots The Spot Removal tool lets you repair a selected area of an image with a sample from another area. 1Select the Spot Removal tool from the toolbar. 2Select one of the following from the Type menu: Heal Matches the texture, lighting, and shading of the sampled area to the selected area. Clone Applies the sampled area of the image to the selected area. 3(Optional) In the tool options under the Histogram, drag the Radius slider to specify the size of the area that the Spot Removal tool affects. 4Move the Spot Removal tool into the photo and click the part of the photo to retouch. A red-and-white dashed circle appears over the selected area. The green-and-white dashed circle designates the sampled area of the photo used to clone or heal. 5Do any of the following: To specify the sampled area, drag inside the green-and-white circle to move it to another area of the image. To specify the selected area being cloned or healed, drag inside the red-and-white circle.
63CREATIVE SUITE 5Camera Raw Last updated 11/16/2011 To adjust the size of the circles, move the pointer over the edge of either circle until it changes to a double-pointing arrow, and then drag to make both circles larger or smaller. To cancel the operation, press Backspace (Windows) or Delete (Mac OS). Repeat this procedure for each area of the image that needs retouching. To remove all sample areas and start over, click the Clear All button in the tool options. Make local adjustments in Camera Raw About local adjustments The controls in the image adjustment tabs of Camera Raw let you affect the color and tone of an entire photo. To make adjustments to a specific area of a photo, like dodging and burning in traditional photography, you can use the Adjustment Brush tool and the Graduated Filter tool in Camera Raw. The Adjustment Brush tool lets you selectively apply Exposure, Brightness, Clarity, and other adjustments by “painting” them onto the photo. The Graduated Filter tool lets you apply the same types of adjustments gradually across a region of a photo. You can make the region as wide or as narrow as you like. You can apply both types of local adjustments to any photo. You can also synchronize local adjustment settings across multiple selected images, and you can create local adjustment presets so that you can quickly reapply an effect that you use frequently. Getting local adjustments “right” in Camera Raw may take some experimentation. The recommended workflow is to select a tool and specify its options, and then apply the adjustment to the photo. Then you can go back and edit that adjustment, or apply a new one. As with all other adjustments applied in Camera Raw, local adjustments are nondestructive. They are never permanently applied to the photo. Local adjustments are saved with an image in the same way that global adjustments are saved: in an XMP sidecar file or in the Camera Raw database, depending on what’s specified in Camera Raw preferences. For a video tutorial on making local adjustments in Camera Raw, watch Photo retouching in Camera Raw on Adobe TV. Apply local adjustments with the Adjustment Brush tool in Camera Raw 1Select the Adjustment Brush tool from the toolbar (or press K). Camera Raw opens the Adjustment Brush tool options under the Histogram and sets the mask mode to New. 2Choose the type of adjustment you want to make in the Adjustment Brush tool options by dragging the slider for any of the following effects: Exposure Sets the overall image brightness, with a greater effect in the highlights. Drag the slider to the right to increase the exposure; drag the slider to the left to decrease the exposure. Brightness Adjusts the image brightness, with a greater effect in the midtones. Drag the slider to the right to increase the brightness; drag the slider to the left to decrease the brightness. Contrast Adjusts the image contrast, with a greater effect in the midtones. Drag the slider to the right to increase the contrast; drag the slider to the left to decrease the contrast.
64CREATIVE SUITE 5Camera Raw Last updated 11/16/2011 Saturation Changes the vividness or purity of the color. Drag the slider to the right to increase the saturation; drag the slider to the left to decrease the saturation. Clarity Adds depth to an image by increasing local contrast. Drag the slider to the right to increase the contrast; drag the slider to the left to decrease the contrast. Sharpness Enhances edge definition to bring out details, using the Radius, Detail, and Masking amounts specified in the Detail tab. (See “Sharpen photos” on page 68.) Drag the slider to the right to sharpen details; drag the slider to the left to blur details. Color Applies a tint to the selected area. Select the hue by clicking the color sample box to the right of the effect name. Click the Plus icons (+) or the Minus icons (-) to increase or decrease the effect by a preset amount. Click multiple times to select a stronger adjustment. Double-click the slider to reset the effect to zero. 3Specify brush options: Size Specifies the diameter of the brush tip, in pixels. Feather Controls the hardness of the brush stroke. Flow Controls the rate of application of the adjustment. Density Controls the amount of transparency in the stroke. Auto Mask Confines brush strokes to areas of similar color. Show Mask Toggles visibility of the mask overlay in the image preview. 4Move the Adjustment Brush tool over the image. The cross hair indicates the application point. The solid circle indicates the brush size. The black-and-white dashed circle indicates the feather amount. Note: If the Feather is set to 0, the black-and-white circle indicates the brush size. With very small feather amounts, the solid circle may not be visible. 5Paint with the Adjustment Brush tool in the area of the image that you want to adjust. When you release the mouse, a pin icon appears at the application point. In the Adjustment Brush tool options, the mask mode changes to Add. 6(Optional) Refine the adjustment by doing any of the following: Drag any of the effect sliders in the Adjustment Brush tool options to customize the effect in the image. Press V to hide or show the pin icon. To toggle visibility of the mask overlay, use the Show Mask option, press Y, or position the pointer over the pin icon. To customize the color of the mask overlay, click the color swatch next to the Show Mask option. Then, choose a new color from the Color Picker. To undo part of the adjustment, click Erase in the Adjustment Brush tool options and paint over the adjustment. To create an eraser brush that has different characteristics from the current Adjustment Brush tool, click the Local Adjustment Settings menu button and choose Separate Eraser Size. Then, specify the Size, Feather, Flow, and Density you want for the eraser. Remove the adjustment completely by selecting the pin and pressing Delete. Press Ctrl+Z (Windows) or Command+Z (Mac OS) to undo your last adjustment. Click Clear All at the bottom of the tool options to remove all Adjustment Brush tool adjustments and set the mask mode to New.
65CREATIVE SUITE 5Camera Raw Last updated 11/16/2011 7(Optional) Click New to apply an additional Adjustment Brush tool adjustment, and refine it as desired using the techniques in step 6. Note: When working with multiple Adjustment Brush adjustments, make sure you’re in Add mode to switch between them. Click a pin icon to select that adjustment and refine it. Apply local adjustments with the Graduated Filter tool in Camera Raw 1Select the Graduated Filter tool from the toolbar (or press G). Camera Raw opens the Graduated Filter tool options under the Histogram and sets the mask mode to New. 2Choose the type of adjustment you want to make in the Graduated Filter tool options by dragging the slider for any of the following effects: Exposure Sets the overall image brightness, with a greater effect in the highlights. Drag the slider to the right to increase the exposure; drag the slider to the left to decrease the exposure. Brightness Adjusts the image brightness, with a greater effect in the midtones. Drag the slider to the right to increase the brightness; drag the slider to the left to decrease the brightness. Contrast Adjusts the image contrast, with a greater effect in the midtones. Drag the slider to the right to increase the contrast; drag the slider to the left to decrease the contrast. Saturation Changes the vividness or purity of the color. Drag the slider to the right to increase the saturation; drag the slider to the left to decrease the saturation. Clarity Adds depth to an image by increasing local contrast. Drag the slider to the right to increase the contrast; drag the slider to the left to decrease the contrast. Sharpness Enhances edge definition to bring out details using the Radius, Detail, and Masking amounts specified in the Detail tab. (See “Sharpen photos” on page 68.) Drag the slider to the right to sharpen details; drag the slider to the left to blur details. Color Applies a tint to the selected area. Select the hue by clicking the color sample box to the right of the effect name. Click the Plus icon (+) or the Minus icon (-) to increase or decrease the effect by a preset amount. Double-click the slider to reset the effect to zero. 3Drag in the photo to apply a graduated filter across a region of the photo. The filter starts at the red dot and red dotted line, and it continues past the green dot and green dotted line. The mask mode switches to Edit in the Graduated Filter tool options. 4(Optional) Refine the filter by doing any of the following: Drag any of the effect sliders in the Graduated Filter tool options to customize the filter. Toggle visibility of the guide overlays by selecting the Show Overlay option (or press V). Drag the green or red dot to freely expand, contract, and rotate the effect. Drag the black-and-white dotted line to shift the effect. Position the pointer over the green-and-white or red-and-white dotted line, near the green or red dot, until a double-pointing arrow appears. Then, drag to expand or contract the effect at that end of the range. Position the pointer over the green-and-white or red-and-white dotted line, away from the green or red dot, until a curved double-pointing arrow appears. Then, drag to rotate the effect. Remove the filter by pressing Delete. Press Ctrl+Z (Windows) or Command+Z (Mac OS) to undo your last adjustment.
66CREATIVE SUITE 5Camera Raw Last updated 11/16/2011 Click Clear All at the bottom of the tool options to remove all Graduated Filter tool effects and set the mask mode to New. 5(Optional) Click New to apply an additional Graduated Filter tool effect, and refine it as desired using the techniques in step 4. Note: When working with multiple Graduated Filter effects, click an overlay to select that effect and refine it. Save and apply local adjustment presets You can save local adjustments as presets so that you can quickly apply the effects to other images. You create, select, and manage local adjustment presets using the Camera Raw Settings menu in the Adjustment Brush or Graduated Filter tool options. You apply local adjustment presets using the Adjustment Brush tool or the Graduated Filter tool . Note: Local adjustments cannot be saved with Camera Raw image presets. ❖In the Adjustment Brush or Graduated Filter tool options in the Camera Raw dialog box, click the Camera Raw Settings menu button . Then, choose one of the following commands: New Local Correction Setting Saves the current local adjustment effect settings as a preset. Type a name and click OK. Saved presets appear in the Local Adjustment Settings menu and can be applied to any image that is opened in Camera Raw. Delete “preset name” Deletes the selected local adjustment preset. Rename “preset name” Renames the selected local adjustment preset. Type a name and click OK. Preset name Select a preset to apply its settings with the Adjustment Brush tool or the Graduated Filter tool. When using local adjustment presets, keep in mind the following: Only one local adjustment preset can be selected at a time. When applying a local adjustment preset with the Adjustment Brush tool, you can still customize the brush options, including Size, Feather, Flow, and Density. The preset applies the effect settings at the specified brush size. After a local adjustment preset is applied, you can refine it as desired. The same effect settings are available for the Adjustment Brush tool and the Graduated Filter tool. As a result, local adjustment presets can be applied using either tool, regardless of which tool was used to create the preset. Correct lens distortions in Camera Raw About lens corrections Camera lenses can exhibit different types of defects at certain focal lengths, f-stops, and focus distances. You can correct for these apparent distortions and aberrations using the Lens Corrections tab of the Camera Raw dialog box. Vignetting causes the edges, especially the corners, of an image to be darker than the center. Use controls in the Lens Vignetting section of the Lens Corrections tab to compensate for vignetting. Barrel distortion causes straight lines to appear to bow outward. Pincushion distortion causes straight lines to appear to bend inward.