## Sigma Tags

These tags are written by Sigma/Foveon cameras. In the early days Sigma was a class leader by releasing their maker note specification to the public, but since then they have deviated from this standard and newer camera models are less than consistent about their metadata formats.

> Tag ID | Tag Name | Writable | Values / Notes
> --- | --- | --- | ---
> 0x0002 | SerialNumber | string |
> 0x0003 | DriveMode | string |
> 0x0004 | ResolutionMode | string |
> 0x0005 | AFMode | string |
> 0x0006 | FocusSetting | string |
> 0x0007 | WhiteBalance | string |
> 0x0008 | ExposureMode | string | 'A' = Aperture-priority AE 'M' = Manual 'P' = Program AE 'S' = Shutter speed priority AE
> 0x0009 | MeteringMode | string | 8 = Multi-segment 'A' = Average 'C' = Center-weighted average
> 0x000a | LensFocalRange | string |
> 0x000b | ColorSpace | string |
> 0x000c | ExposureCompensation ExposureAdjust? | string rational64s |
> 0x000d | Contrast Contrast | string rational64s |
> 0x000e | Shadow Shadow | string rational64s |
> 0x000f | Highlight Highlight | string rational64s |
> 0x0010 | Saturation Saturation | string rational64s |
> 0x0011 | Sharpness Sharpness | string rational64s |
> 0x0012 | X3FillLight X3FillLight | string rational64s |
> 0x0014 | ColorAdjustment ColorAdjustment | string rational64s[3] |
> 0x0015 | AdjustmentMode | string |
> 0x0016 | Quality | string |
> 0x0017 | Firmware | string |
> 0x0018 | Software | string |
> 0x0019 | AutoBracket | string |
> 0x001a | PreviewImageStart ChrominanceNoiseReduction | int32u* string | (Sigma Photo Pro writes ChrominanceNoiseReduction here, but various models use this for PreviewImageStart)
> 0x001b | PreviewImageLength LuminanceNoiseReduction | int32u* string | (Sigma Photo Pro writes LuminanceNoiseReduction here, but various models use this for PreviewImageLength)
> 0x001c | PreviewImageSize PreviewImageStart | int16u[2] int32u* | (PreviewImageStart for the SD1 and Merrill models, and PreviewImageSize for others)
> 0x001d | MakerNoteVersion PreviewImageLength | undef int32u* | (PreviewImageLength for the SD1 and Merrill models, and MakerNoteVersion for others)
> 0x001e | PreviewImageSize | int16u[2] | (only valid for some models)
> 0x001f | AFPoint MakerNoteVersion | string undef | (MakerNoteVersion for the SD1 and Merrill models, and AFPoint for others)
> 0x0022 | FileFormat | string | (models other than the SD1 and Merrill models)
> 0x0024 | Calibration | string | (models other than the SD1 and Merrill models)
> 0x0026 | FileFormat | string | (SD1 and Merrill models only)
> 0x0027 | LensType | string | --> Sigma LensType Values (SD1 and Merrill models only)
> 0x002a | LensFocalRange | rational64u[2] | (SD1 and Merrill models only)
> 0x002b | LensMaxApertureRange | rational64u[2] | (SD1 and Merrill models only)
> 0x002c | ColorMode | int32u | (not valid for some models)
> 0 = n/a 1 = Sepia 2 = B&W 3 = Standard |  | 4 = Vivid 5 = Neutral 6 = Portrait 7 = Landscape |
> 0x0030 | LensApertureRange Calibration | string string | (Calibration for the SD1 and Merrill models, and LensApertureRange for others. Note that LensApertureRange changes with focal length, and some models report the maximum aperture here)
> 0x0031 | FNumber | rational64u | (models other than the SD1 and Merrill models)
> 0x0032 | ExposureTime | rational64u | (models other than the SD1 and Merrill models)
> 0x0033 | ExposureTime2 | string | (models other than the SD1, SD9, SD15 and Merrill models)
> 0x0034 | BurstShot | int32u | (models other than the SD1 and Merrill models)
> 0x0035 | ExposureCompensation | rational64s | (models other than the SD1 and Merrill models)
> 0x0039 | SensorTemperature | string | (models other than the SD1 and Merrill models)
> 0x003a | FlashExposureComp | rational64s | (models other than the SD1 and Merrill models)
> 0x003b | Firmware | string | (models other than the SD1 and Merrill models)
> 0x003c | WhiteBalance | string | (models other than the SD1 and Merrill models)
> 0x003d | PictureMode | string | (same as ColorMode, but "Standard" when ColorMode is Sepia or B&W)
> 0x0048 | LensApertureRange | string | (SD1 and Merrill models only)
> 0x0049 | FNumber | rational64u | (SD1 and Merrill models only)
> 0x004a | ExposureTime | rational64u | (SD1 and Merrill models only)
> 0x004b | ExposureTime2 | string | (SD1 and Merrill models only)
> 0x004d | ExposureCompensation | rational64s | (SD1 and Merrill models only)
> 0x0055 | SensorTemperature | string | (SD1 and Merrill models only)
> 0x0056 | FlashExposureComp | rational64s | (SD1 and Merrill models only)
> 0x0057 | Firmware | string | (SD1 and Merrill models only)
> 0x0058 | WhiteBalance | string | (SD1 and Merrill models only)
> 0x0059 | DigitalFilter | string | (SD1 and Merrill models only)

## Sigma LensType Values

Decimal values have been added to differentiate lenses which would otherwise have the same LensType, and are used by the Composite LensID tag when attempting to identify the specific lens model.

> Value | LensType | Value | LensType
> --- | --- | --- | ---
> 16 | = Sigma 18-50mm F3.5-5.6 DC | 169 | = Sigma 18-50mm F2.8 EX DC
> 129 | = Sigma 14mm F2.8 EX Aspherical | 581 | = Sigma 18-50mm F2.8 EX DC Macro
> 131 | = Sigma 17-70mm F2.8-4.5 DC Macro | 583 | = Sigma 17-50mm F2.8 EX DC OS
> 145 | = Sigma Lens (145) | 1003 | = Sigma 19mm F2.8
> 145.1 | = Sigma 15-30mm F3.5-4.5 EX DG Aspherical | 1004 | = Sigma 30mm F2.8
> 145.2 | = Sigma 18-50mm F2.8 EX DG | 1005 | = Sigma 50mm F2.8 Macro
> 145.3 | = Sigma 20-40mm F2.8 EX DG | 8900 | = Sigma 70-300mm F4-5.6 DG OS
> 165 | = Sigma 70-200mm F2.8 EX | 'A100' | = Sigma 24-70mm F2.8 DG Macro

(This document generated automatically by Image::ExifTool::BuildTagLookup)
Last revised Feb 22, 2013

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