| Tag Name | Writable | Derived From | Values / Notes | 
|---|
| Aperture | N | FNumber ApertureValue
 |  | 
| BlueBalance | N | WB_RGGBLevels WB_RGBGLevels
 WB_RBGGLevels
 WB_GRBGLevels
 WB_GRGBLevels
 WB_RBLevels
 WBBlueLevel
 WBGreenLevel
 |  | 
| CFAPattern | N | CFARepeatPatternDim CFAPattern2
 |  | 
| CircleOfConfusion | N | ScaleFactor35efl | (this value may be incorrect if the image has been resized.  Calculated as
D/1440, where D is the focal plane diagonal in mm) | 
| ConditionalFEC | N | FlashExposureComp FlashBits
 |  | 
| DOF | N | FocusDistance FocalLength
 Aperture
 CircleOfConfusion
 | (this value may be incorrect if the image has been resized) | 
| DateCreated | N | Kodak:YearCreated Kodak:MonthDayCreated
 |  | 
| DateTimeCreated | N | DateCreated TimeCreated
 |  | 
| DateTimeOriginal | N | DateTimeCreated |  | 
| DigitalZoom | N | Canon:ZoomSourceWidth Canon:ZoomTargetWidth
 Canon:DigitalZoom
 |  | 
| DriveMode | N | ContinuousDrive SelfTimer
 | 0 = Continuous shooting 1 = Self-timer Operation
 2 = Single-frame shooting
 | 
| Duration | N | FLAC:SampleRate FLAC:Channels
 FLAC:TotalSamples
 |  | 
| Duration | N | FileSize MPEG:AudioBitrate
 MPEG:VideoBitrate
 |  | 
| Duration | N | FrameRate FrameCount
 |  | 
| ExtenderStatus | N | Olympus:Extender Olympus:LensType
 MaxApertureValue
 | (Olympus cameras have the quirk that they may retain the extender settings
after the extender is removed until the camera is powered off.  This tag is
an attempt to represent the actual status of the extender.) 0 = Not attached
 1 = Attached
 2 = Removed
 | 
| FOV | N | FocalLength ScaleFactor35efl
 FocusDistance
 | (calculated for the long image dimension, this value may be incorrect for
fisheye lenses, or if the image has been resized) | 
| FlashOn | N | FlashBits Flash
 | 0 = Off 1 = On
 | 
| FlashType | N | FlashBits | 0 = Built-In Flash 1 = External
 | 
| FocalLength35efl | N | FocalLength ScaleFactor35efl
 | (this value may be incorrect if the image has been resized) | 
| GPSDateTime | N | GPS:GPSDateStamp GPS:GPSTimeStamp
 |  | 
| GPSLatitude | N | GPS:GPSLatitude GPS:GPSLatitudeRef
 |  | 
| GPSLatitudeRef | N | XMP:GPSLatitude | 'N' = North 'S' = South
 | 
| GPSLongitude | N | GPS:GPSLongitude GPS:GPSLongitudeRef
 |  | 
| GPSLongitudeRef | N | XMP:GPSLongitude | 'E' = East 'W' = West
 | 
| GPSPosition | N | GPSLatitude GPSLongitude
 |  | 
| HyperfocalDistance | N | FocalLength Aperture
 CircleOfConfusion
 | (this value may be incorrect if the image has been resized) | 
| ISO | N | Canon:CameraISO Canon:BaseISO
 Canon:AutoISO
 | (use CameraISO if numerical, otherwise calculate as BaseISO * AutoISO / 100) | 
| ImageHeight | N | PostScript:ImageData PostScript:BoundingBox
 |  | 
| ImageSize | N | ImageWidth ImageHeight
 |  | 
| ImageWidth | N | PostScript:ImageData PostScript:BoundingBox
 |  | 
| JpgFromRaw | Y | JpgFromRawStart JpgFromRawLength
 |  | 
| Lens | N | ShortFocal LongFocal
 |  | 
| Lens35efl | N | ShortFocal LongFocal
 Lens
 ScaleFactor35efl
 |  | 
| LensID | N | Nikon:LensIDNumber LensFStops
 MinFocalLength
 MaxFocalLength
 MaxApertureAtMinFocal
 MaxApertureAtMaxFocal
 MCUVersion
 Nikon:LensType
 | --> Nikon LensID Values | 
| LensSpec | N | Nikon:Lens Nikon:LensType
 |  | 
| LightValue | N | Aperture ShutterSpeed
 ISO
 | (calculated LV -- similar to exposure value but includes ISO speed) | 
| OriginalDecisionData | Y! | OriginalDecisionDataOffset |  | 
| OtherImage | N | OtherImageStart OtherImageLength
 |  | 
| PreviewImage | Y | PreviewImageStart PreviewImageLength
 PreviewImageValid
 PreviewImageStart (1)
 PreviewImageLength (1)
 |  | 
| PreviewImageSize | N | PreviewImageWidth PreviewImageHeight
 |  | 
| PreviewImage | N | ScreenNail |  | 
| RedBalance | N | WB_RGGBLevels WB_RGBGLevels
 WB_RBGGLevels
 WB_GRBGLevels
 WB_GRGBLevels
 WB_RBLevels
 WBRedLevel
 WBGreenLevel
 |  | 
| RedEyeReduction | N | CanonFlashMode FlashBits
 | 0 = Off 1 = On
 | 
| ScaleFactor35efl | N | FocalLength FocalLengthIn35mmFormat
 Composite:DigitalZoom
 FocalPlaneDiagonal
 FocalPlaneXSize
 FocalPlaneYSize
 FocalPlaneResolutionUnit
 FocalPlaneXResolution
 FocalPlaneYResolution
 CanonImageWidth
 CanonImageHeight
 ExifImageWidth
 ExifImageHeight
 ImageWidth
 ImageHeight
 | (this value and any derived values may be incorrect if image has been resized) | 
| ShootingMode | N | CanonExposureMode EasyMode
 |  | 
| ShutterCurtainHack | N | FlashBits ShutterCurtainSync
 | 0 = 1st-curtain sync 1 = 2nd-curtain sync
 | 
| ShutterSpeed | N | ExposureTime ShutterSpeedValue
 BulbDuration
 |  | 
| SubSecDateTimeOriginal | N | DateTimeOriginal SubSecTimeOriginal
 |  | 
| ThumbnailImage | Y | ThumbnailOffset ThumbnailLength
 |  | 
| WB_RGGBLevels | N | Canon:WhiteBalance WB_RGGBLevelsAsShot
 WB_RGGBLevelsAuto
 WB_RGGBLevelsDaylight
 WB_RGGBLevelsCloudy
 WB_RGGBLevelsTungsten
 WB_RGGBLevelsFluorescent
 WB_RGGBLevelsFlash
 WB_RGGBLevelsCustom
 WB_RGGBLevelsShade
 WB_RGGBLevelsKelvin
 |  |