Better Light 7 manual Exposure Evaluation, Digital Spot Metering, RGB Data Values, EV Units

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Exposure Evaluation

Digital Spot Metering

The camera control software includes two types of digital spot meters. The first is a “live” spot meter that displays information about the image as the cursor is moved within the preview area. Specific areas of the image can be metered at any time by moving the cursor to the area of interest in the preview image and reading the various displays. The second type of digital spot meter is a “static” spot meter which allows for up to twelve locations in the image to be recorded and recalled. These readings are updated automatically when a new prescan is performed, allowing rapid rechecking of important areas to see the effects of adjustments.

The live spot meter is available whenever the cursor is within the preview image area, regardless of the currently selected tool. The Spot Meter tool may be selected from the tool buttons at the top of the preview screen to mark static spot meter locations in the pre- view image.

RGB Data Values, EV Units

When the cursor is within the preview image area the information for the pixels under the cursor is displayed above the histogram. The information is continually updated as the cursor is moved to various locations within the image.

Above the histogram window, the individual red, green, and blue output data values are dis- played, with a range of zero (minimum brightness, or maximum print density) to 255 (maximum brightness, or minimum print density). The average of the red, green, and blue values is displayed as

the RGB value.

In addition to the RGB values, the relative EV display provides additional information about the pixels under the live spot meter cursor. The EV display is on the right side and is always preceded by a “+” or “-” and these numbers show the relative EV (f-stops) for the metered location. This reading is affected by exposure and color balance changes, but not significantly by tone curve changes.

Zero on this EV scale is preset to about 4.5 EV (4.5 f-stops) below the maximum CCD exposure, providing a readout range of as much as +4.5 to -5.2 EV (over 9 f-stops). If the zero point on the sliding scale under the Tone curve is moved, the live spot meter EV values will change to correspond to the new zero point.

Use the EV readout to determine the relative differences in luminance between various parts of the scene. This can be helpful in selecting or adjusting the tone curve and/or the lighting to achieve a predetermined range of image data.

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Contents Revision D March Large Format Digital Scanning Camera SystemAcknowledgements Page Page Contents Locking Both Lock Crop RatioAltering Color Balance for Mood or Effect Audio Focusing Aid Multiple Color FocusingSaving a High Bit Depth Image Limit LineAutomatically Opening the Image Exporting NotesHardware Setup Software Operation Line TimeLighting Parts List Connector Identification Getting Started Installing and Configuring the ViewFinder SoftwareSystem Requirements Memory RequirementsMacintosh PC PC version of the software is requiredConnect the camera insert to the control unit Quick Start GuideConnect the control unit to the host computer Mate the female end of the cable with the DBInstall the viewing overlay on the camera’s ground glass Connect the AC power to the control unitTurn on the digital camera Turn on the host computerMm thick Tungsten infrared blocking filter Install the infrared blocking filterCompose and focus the image Select the image capture settingsPut the insert into the camera Start the ViewFinder softwareTake the picture PrescanTransfer the file to the computer View the final imageMaking a Prescan PrescanningFast Prescans Cropped Prescans Super View Prescans Canceling a Prescan Saving and Viewing PrescansColor Managed Prescans Guides RulersResolution Image Capture SettingsPage Line Time ISO Exposure Lock Capture ModeCanceling a Scan ScanningScanning to the Camera Disk Automatically Naming Images Naming the ImageAdding Notes to Your Picture Exposure Evaluation Digital Spot MeteringRGB Data Values, EV Units Determining Relative Exposure Static Spot Meter Tool Setting the Spot Meter Size Judging Overall and Spot Exposures HistogramStatic Spot Meter Location Readings Tool Bar Magnify ToolHand Tool Panorama Tool Measure Tool Mac onlyToneZones Tool Page Grid Tool Crop Mask ToolPage Tab Panels Size PanelScan Area & Cropping Different unit. Example 15.24 cm x 10.16 cm at 300 pixels per Size of the cropped area may still be adjusted whileClicking up or down buttons of Scan Area Lock Crop Ratio To set a specific shape for crop rectangleLock File Size To specify an exact file size Seconds Scan direction Faster Scans for FreeEstablishing Neutral Color Balance Color PanelSaving Color Balances Changing Existing Color Balances Deleting Color BalancesAltering Color Balance for Mood or Effect Tagging Images with ICC Profiles Reverting to a Previous Color BalanceTone Curve Selections Tone PanelSaving a High Bit Depth Image Brightness/Contrast Tone Curve Adjustments Manual Tone Curve Adjustments Spot Meter Reference Points Limit LineNegative Curves Bit Tone CurvesSetting the EV Scale Reference Tone Curve HistogramSelecting an Output Tone Scale Deleting Tone Curves Saving Tone CurvesLarge Focus Display Focus PanelSelecting a Focus Site Reading the Focus Displays and Adjusting Focus Multiple Color Focusing Audio Focusing Aid Mac onlyInfrared Focus Image File Management and Retrieval ViewFinder File Manager Sorting Image Files Adding more Notes to Your PicturesExporting Notes Automatically Opening the Image Automatically Saving Files to a FolderRetrieving Image Files Selecting the Retrieval Tone Curve USB controller only Hard Drive Storage Capacity Deleting Image FilesFile Menu MenusEdit Menu Display Menu Camera Menu Clean/Park Capture ModeDiagnostics Opens the Clean/Park window to expose the CCD for cleaningAutomatically Retrieving Images Saving Files User PreferencesAfter highlighting the desired folder, click Right of the Save scan folder labelAutomatically Save Prescans Auto NamingAutomatic Scan Viewing in an Application Auto File Open Mask Auto-rotate Retrieved FilesGuides GridUsing Sounds Baseline ISO SettingISO Increment Selection Use this feature, the factory settings are adequate Pano SettingsTime Lapse CropAppendix a Cleaning the CCD Cover GlassAppendix B Exposure AdjustmentsManipulating Exposure Line TimeColor Balance Sensitivity Tone CurvesLens Aperture Lighting Appendix C Line Time SettingsAppendix D Resolution SelectionsModel 4000E-HS Model 6000-HS, 6000E-HSSuper 6K-HS Super 8K-HS Power Status IndicatorsAppendix E StatusAppendix F Hardware SetupPanoramic Adapter Scene PanoramaPage Rollout Panorama Hardware is assembled just as it is for a Rollout panorama Object PanoramaCamera reported error Not Ready Error MessagesCamera reported error No Room Camera reported error Conversion ErrorCamera reported error Math Error Camera reported error Value ErrorScsi Errors Comm returned error Other Errors Unknown ErrorCamera Timed Out
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