## CanonRaw Tags

These tags apply to CRW-format Canon RAW files and information in the APP0 "CIFF" segment of JPEG images. When writing CanonRaw/CIFF information, the length of the information is preserved (and the new information is truncated or padded as required) unless Writable is `resize`. Currently, only JpgFromRaw and ThumbnailImage are allowed to change size. See canon_raw.html for a description of the Canon CRW format.

CRW images also support the addition of a CanonVRD trailer, which in turn supports XMP. This trailer is created automatically if necessary when ExifTool is used to write XMP to a CRW image.

> Tag ID | Tag Name | Writable | Values / Notes
> --- | --- | --- | ---
> 0x0000 | NullRecord | undef |
> 0x0001 | FreeBytes | undef |
> 0x0032 | CanonColorInfo1 | no |
> 0x0805 | CanonFileDescription UserComment | string[32] string[256] |
> 0x080a | CanonRawMakeModel | - | --> CanonRaw MakeModel Tags
> 0x080b | CanonFirmwareVersion | string[32] |
> 0x080c | ComponentVersion | string |
> 0x080d | ROMOperationMode | string[8] |
> 0x0810 | OwnerName | string[32] |
> 0x0815 | CanonImageType | string[32] |
> 0x0816 | OriginalFileName | string[32] |
> 0x0817 | ThumbnailFileName | string[32] |
> 0x100a | TargetImageType | int16u | 0 = Real-world Subject 1 = Written Document
> 0x1010 | ShutterReleaseMethod | int16u | 0 = Single Shot 2 = Continuous Shooting
> 0x1011 | ShutterReleaseTiming | int16u | 0 = Priority on shutter 1 = Priority on focus
> 0x1016 | ReleaseSetting | int16u |
> 0x101c | BaseISO | int16u |
> 0x1028 | CanonFlashInfo? | int16u[4] |
> 0x1029 | CanonFocalLength | - | --> Canon FocalLength Tags
> 0x102a | CanonShotInfo | - | --> Canon ShotInfo Tags
> 0x102c | CanonColorInfo2 | no |
> 0x102d | CanonCameraSettings | - | --> Canon CameraSettings Tags
> 0x1030 | WhiteSample | - | --> CanonRaw WhiteSample Tags
> 0x1031 | SensorInfo | - | --> Canon SensorInfo Tags
> 0x1033 | CustomFunctions10D CustomFunctionsD30 CustomFunctionsD60 CustomFunctionsUnknown | - - - - | --> CanonCustom Functions10D Tags --> CanonCustom FunctionsD30 Tags --> CanonCustom FunctionsD30 Tags --> CanonCustom FuncsUnknown Tags
> 0x1038 | CanonAFInfo | - | --> Canon AFInfo Tags
> 0x1093 | CanonFileInfo | - | --> Canon FileInfo Tags
> 0x10a9 | ColorBalance | - | --> Canon ColorBalance Tags
> 0x10ae | ColorTemperature | int16u |
> 0x10b4 | ColorSpace | int16u | 1 = sRGB 2 = Adobe RGB 65535 = Uncalibrated
> 0x10b5 | RawJpgInfo | - | --> CanonRaw RawJpgInfo Tags
> 0x1803 | ImageFormat | - | --> CanonRaw ImageFormat Tags
> 0x1804 | RecordID | int32u |
> 0x1806 | SelfTimerTime | int32u |
> 0x1807 | TargetDistanceSetting | float |
> 0x180b | SerialNumber UnknownNumber? | int32u yes |
> 0x180e | TimeStamp | - | --> CanonRaw TimeStamp Tags
> 0x1810 | ImageInfo | - | --> CanonRaw ImageInfo Tags
> 0x1813 | FlashInfo | - | --> CanonRaw FlashInfo Tags
> 0x1814 | MeasuredEV | float | (this is the Canon name for what could better be called MeasuredLV, and should be close to the calculated LightValue for a proper exposure with most models)
> 0x1817 | FileNumber | int32u |
> 0x1818 | ExposureInfo | - | --> CanonRaw ExposureInfo Tags
> 0x1834 | CanonModelID | int32u | --> Canon CanonModelID Values (this is the complete list of model ID numbers, but note that many of these models do not produce CRW images)
> 0x1835 | DecoderTable | - | --> CanonRaw DecoderTable Tags
> 0x183b | SerialNumberFormat | int32u | 0x90000000 = Format 1 0xa0000000 = Format 2
> 0x2005 | RawData | no |
> 0x2007 | JpgFromRaw | resize^ |
> 0x2008 | ThumbnailImage | resize^ |
> 0x2804 | ImageDescription | - | --> CanonRaw Tags
> 0x2807 | CameraObject | - | --> CanonRaw Tags
> 0x3002 | ShootingRecord | - | --> CanonRaw Tags
> 0x3003 | MeasuredInfo | - | --> CanonRaw Tags
> 0x3004 | CameraSpecification | - | --> CanonRaw Tags
> 0x300a | ImageProps | - | --> CanonRaw Tags
> 0x300b | ExifInformation | - | --> CanonRaw Tags

## CanonRaw MakeModel Tags

> Index1 | Tag Name | Writable | Values / Notes
> --- | --- | --- | ---
> 0 | Make | string[6] |
> 6 | Model | string |

## CanonRaw WhiteSample Tags

> Index2 | Tag Name | Writable | Values / Notes
> --- | --- | --- | ---
> 1 | WhiteSampleWidth | no |
> 2 | WhiteSampleHeight | no |
> 3 | WhiteSampleLeftBorder | no |
> 4 | WhiteSampleTopBorder | no |
> 5 | WhiteSampleBits | no |
> 55 | BlackLevels | no |

## CanonRaw RawJpgInfo Tags

> Index2 | Tag Name | Writable | Values / Notes
> --- | --- | --- | ---
> 1 | RawJpgQuality | int16u | 1 = Economy 2 = Normal 3 = Fine 5 = Superfine
> 2 | RawJpgSize | int16u | 0 = Large 1 = Medium 2 = Small
> 3 | RawJpgWidth | int16u |
> 4 | RawJpgHeight | int16u |

## CanonRaw ImageFormat Tags

> Index4 | Tag Name | Writable | Values / Notes
> --- | --- | --- | ---
> 0 | FileFormat | int32u | 0x10000 = JPEG (lossy) 0x10002 = JPEG (non-quantization) 0x10003 = JPEG (lossy/non-quantization toggled) 0x20001 = CRW
> 1 | TargetCompressionRatio | float |

## CanonRaw TimeStamp Tags

> Index4 | Tag Name | Writable | Values / Notes
> --- | --- | --- | ---
> 0 | DateTimeOriginal | int32u |
> 1 | TimeZoneCode | int32s |
> 2 | TimeZoneInfo | int32u | (set to 0x80000000 if TimeZoneCode is valid)

## CanonRaw ImageInfo Tags

> Index4 | Tag Name | Writable | Values / Notes
> --- | --- | --- | ---
> 0 | ImageWidth | no |
> 1 | ImageHeight | no |
> 2 | PixelAspectRatio | no |
> 3 | Rotation | int32s |
> 4 | ComponentBitDepth | no |
> 5 | ColorBitDepth | no |
> 6 | ColorBW | no |

## CanonRaw FlashInfo Tags

> Index4 | Tag Name | Writable | Values / Notes
> --- | --- | --- | ---
> 0 | FlashGuideNumber | float |
> 1 | FlashThreshold | float |

## CanonRaw ExposureInfo Tags

> Index4 | Tag Name | Writable | Values / Notes
> --- | --- | --- | ---
> 0 | ExposureCompensation | float |
> 1 | ShutterSpeedValue | float |
> 2 | ApertureValue | float |

## CanonRaw DecoderTable Tags

> Index4 | Tag Name | Writable | Values / Notes
> --- | --- | --- | ---
> 0 | DecoderTableNumber | no |
> 2 | CompressedDataOffset | no |
> 3 | CompressedDataLength | no |

(This document generated automatically by Image::ExifTool::BuildTagLookup)
Last revised Feb 6, 2026

<-- ExifTool Tag Names