Better Light 7 manual Infrared Focus

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be added to the displays. All three channels may be selected for simultaneous display. As mentioned earlier, this focusing system is so accurate that it is often possible to determine slightly diﬀerent best- focus positions for each color, even when using the ﬁnest apochromatic lenses. Best focus must be determined by adjusting the focus for a given color to determine if the focus displays were in fact indicating a maximum.

It is NOT possible to determine relative focus by simply comparing the focus-quality number displayed for each channel, since each color stripe is sensing a slightly diﬀerent physical location within the image.

When checking focus across multiple colors, remember that only one focus position can ulti- mately be used for the ﬁnal scan. Whether to maximize the focus for a single color, or to split any focus position diﬀerence between colors, will be left to the user’s experience.

Infrared Focus

The focus of a lens varies according to the wavelength of light. Modern lenses have a variety of special coatings to focus the full spectrum of visible light at the same point. However, for infrared light the focal point is diﬀerent than visible light. On some lenses, a small red dot marks the adjusted position for the lens’ focus for infrared. Using the digital focus of the Better Light scan back allows for taking infrared images and assuring as sharp a focus as possible.

Images can be made with both infrared and visible light by removing the infrared blocking ﬁlter prior to taking an image.

When taking a visible and infrared combined image, if the focus is set for visible light then the infrared light will be slightly out of focus (but often not objectionably so).

An infrared only image can be made by replacing the infrared blocking ﬁlter with a Wrat- ten 87 ﬁlter (or equivalent) to allow only the infrared light to the sensor. Then take a prescan and adjust the focus in the same manner as previously described for a visible only image.

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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 NotesLighting Hardware Setup Software OperationLine Time 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 Color Managed Prescans Canceling a PrescanSaving and Viewing Prescans Guides RulersResolution Image Capture SettingsPage Line Time ISO Exposure Lock Capture ModeScanning to the Camera Disk Canceling a ScanScanning Automatically Naming Images Naming the ImageAdding Notes to Your Picture RGB Data Values, EV Units Exposure EvaluationDigital Spot Metering Determining Relative Exposure Static Spot Meter Tool Setting the Spot Meter Size Judging Overall and Spot Exposures HistogramStatic Spot Meter Location Readings Hand Tool Tool BarMagnify Tool Panorama Tool Measure Tool Mac onlyToneZones Tool Page Grid Tool Crop Mask ToolPage Scan Area & Cropping Tab PanelsSize Panel 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 Altering Color Balance for Mood or Eﬀect Changing Existing Color BalancesDeleting Color Balances 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 CurvesSelecting an Output Tone Scale Setting the EV Scale ReferenceTone Curve Histogram Deleting Tone Curves Saving Tone CurvesLarge Focus Display Focus Panel Selecting 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 Exporting Notes Sorting Image FilesAdding more Notes to Your Pictures 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 labelAutomatic Scan Viewing in an Application Auto File Open Automatically Save PrescansAuto Naming Mask Auto-rotate Retrieved FilesGuides GridISO Increment Selection Using SoundsBaseline ISO Setting Use this feature, the factory settings are adequate Pano SettingsTime Lapse CropAppendix a Cleaning the CCD Cover GlassAppendix B Exposure AdjustmentsManipulating Exposure Line TimeLens Aperture Color Balance SensitivityTone Curves 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