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 AE0x0009 MeteringMode string 8 = Multi-segment
'A' = Average
'C' = Center-weighted average0x000a LensFocalRange string 0x000b ColorSpace string 0x000c ExposureCompensation
ExposureAdjust?string
rational64s0x000d Contrast
Contraststring
rational64s0x000e Shadow
Shadowstring
rational64s0x000f Highlight
Highlightstring
rational64s0x0010 Saturation
Saturationstring
rational64s0x0011 Sharpness
Sharpnessstring
rational64s0x0012 X3FillLight
X3FillLightstring
rational64s0x0014 ColorAdjustment
ColorAdjustmentstring
rational64s[3]0x0015 AdjustmentMode string 0x0016 Quality string 0x0017 Firmware string 0x0018 Software string 0x0019 AutoBracket string 0x001a PreviewImageStart
ChrominanceNoiseReductionint32u*
string(Sigma Photo Pro writes ChrominanceNoiseReduction here, but various models use this for PreviewImageStart) 0x001b PreviewImageLength
LuminanceNoiseReductionint32u*
string(Sigma Photo Pro writes LuminanceNoiseReduction here, but various models use this for PreviewImageLength) 0x001c PreviewImageSize
PreviewImageStartint16u[2]
int32u*(PreviewImageStart for the SD1 and Merrill/Quattro models, and PreviewImageSize for others) 0x001d MakerNoteVersion
PreviewImageLengthundef
int32u*(PreviewImageLength for the SD1 and Merrill/Quattro models, and MakerNoteVersion for others) 0x001e PreviewImageSize int16u[2] (only valid for some models) 0x001f AFPoint
MakerNoteVersionstring
undef(MakerNoteVersion for the SD1 and Merrill/Quattro models, and AFPoint for others) 0x0022 FileFormat string (models other than the SD1 and Merrill/Quattro models) 0x0024 Calibration string (models other than the SD1 and Merrill/Quattro models) 0x0026 FileFormat string (SD1 and Merrill/Quattro models only) 0x0027 LensType string --> Sigma LensType Values
(SD1 and Merrill/Quattro models only)0x002a LensFocalRange rational64u[2] (SD1 and Merrill/Quattro models only) 0x002b LensMaxApertureRange rational64u[2] (SD1 and Merrill/Quattro models only) 0x002c ColorMode int32u (not valid for some models)
0 = n/a
1 = Sepia
2 = B&W
3 = Standard
4 = Vivid5 = Neutral
6 = Portrait
7 = Landscape
8 = FOV Classic Blue0x0030 LensApertureRange
Calibrationstring
string(Calibration for the SD1 and Merrill/Quattro 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/Quattro models) 0x0032 ExposureTime rational64u (models other than the SD1 and Merrill/Quattro models) 0x0033 ExposureTime2 string (models other than the SD1, SD9, SD15 and Merrill/Quattro models) 0x0034 BurstShot int32u (models other than the SD1 and Merrill/Quattro models) 0x0035 ExposureCompensation rational64s (models other than the SD1 and Merrill/Quattro models) 0x0039 SensorTemperature string (models other than the SD1 and Merrill/Quattro models) 0x003a FlashExposureComp rational64s (models other than the SD1 and Merrill/Quattro models) 0x003b Firmware string (models other than the SD1 and Merrill/Quattro models) 0x003c WhiteBalance string (models other than the SD1 and Merrill/Quattro models) 0x003d PictureMode string (same as ColorMode, but "Standard" when ColorMode is Sepia or B&W) 0x0048 LensApertureRange string (SD1 and Merrill/Quattro models only) 0x0049 FNumber rational64u (SD1 and Merrill/Quattro models only) 0x004a ExposureTime rational64u (SD1 and Merrill/Quattro models only) 0x004b ExposureTime2 string (SD1 and Merrill/Quattro models only)
(SD1 and Merrill/Quattro models only)0x004d ExposureCompensation rational64s (SD1 and Merrill/Quattro models only) 0x0055 SensorTemperature string (SD1 and Merrill/Quattro models only) 0x0056 FlashExposureComp rational64s (SD1 and Merrill/Quattro models only) 0x0057 Firmware string (SD1 and Merrill/Quattro models only) 0x0058 WhiteBalance string (SD1 and Merrill/Quattro models only) 0x0059 DigitalFilter string (SD1 and Merrill/Quattro models only)
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 486 = Sigma 4.5mm F2.8 EX DC HSM Circular Fisheye 103 = Sigma 180mm F3.5 EX IF HSM APO Macro 506 = Sigma 70-300mm F4-5.6 APO Macro Super II 104 = Sigma 150mm F2.8 EX DG HSM APO Macro 507 = Sigma 70-300mm F4-5.6 DL Macro Super II 105 = Sigma 180mm F3.5 EX DG HSM APO Macro 508 = Sigma 70-300mm F4-5.6 DG APO Macro 106 = Sigma 150mm F2.8 EX DG OS HSM APO Macro 509 = Sigma 70-300mm F4-5.6 DG Macro 107 = Sigma 180mm F2.8 EX DG OS HSM APO Macro 510 = Sigma 17-35 F2.8-4 EX DG ASP 129 = Sigma 14mm F2.8 EX Aspherical 512 = Sigma 15-30mm F3.5-4.5 EX DG ASP DF 131 = Sigma 17-70mm F2.8-4.5 DC Macro 513 = Sigma 20-40mm F2.8 EX DG 134 = Sigma 100-300mm F4 EX DG HSM APO 519 = Sigma 17-35 F2.8-4 EX ASP HSM 135 = Sigma 120-300mm F2.8 EX DG HSM APO 520 = Sigma 100-300mm F4.5-6.7 DL 136 = Sigma 120-300mm F2.8 EX DG OS HSM APO 521 = Sigma 18-50mm F3.5-5.6 DC Macro 137 = Sigma 120-300mm F2.8 DG OS HSM | S 527 = Sigma 100-300mm F4 EX IF HSM 143 = Sigma 600mm F8 Mirror 529 = Sigma 120-300mm F2.8 EX HSM IF APO 145 = Sigma Lens (145) 547 = Sigma 24-60mm F2.8 EX DG 145.1 = Sigma 15-30mm F3.5-4.5 EX DG Aspherical 548 = Sigma 24-70mm F2.8 EX DG Macro 145.2 = Sigma 18-50mm F2.8 EX DG 549 = Sigma 28-70mm F2.8 EX DG 145.3 = Sigma 20-40mm F2.8 EX DG 566 = Sigma 70-200mm F2.8 EX IF APO 152 = Sigma APO 800mm F5.6 EX DG HSM 567 = Sigma 70-200mm F2.8 EX IF HSM APO 165 = Sigma 70-200mm F2.8 EX 568 = Sigma 70-200mm F2.8 EX DG IF HSM APO 169 = Sigma 18-50mm F2.8 EX DC 569 = Sigma 70-200 F2.8 EX DG HSM APO Macro 183 = Sigma 500mm F4.5 EX HSM APO 571 = Sigma 24-70mm F2.8 IF EX DG HSM 184 = Sigma 500mm F4.5 EX DG HSM APO 572 = Sigma 70-300mm F4-5.6 DG OS 194 = Sigma 300mm F2.8 EX HSM APO 579 = Sigma 70-200mm F2.8 EX DG HSM APO Macro 195 = Sigma 300mm F2.8 EX DG HSM APO 580 = Sigma 18-50mm F2.8 EX DC 200 = Sigma 12-24mm F4.5-5.6 EX DG ASP HSM 581 = Sigma 18-50mm F2.8 EX DC Macro 201 = Sigma 10-20mm F4-5.6 EX DC HSM 582 = Sigma 18-50mm F2.8 EX DC HSM Macro 202 = Sigma 10-20mm F3.5 EX DC HSM 583 = Sigma 17-50mm F2.8 EX DC OS HSM 203 = Sigma 8-16mm F4.5-5.6 DC HSM 589 = Sigma APO 70-200mm F2.8 EX DG OS HSM 204 = Sigma 12-24mm F4.5-5.6 DG HSM II 595 = Sigma 300-800mm F5.6 EX DG APO HSM 210 = Sigma 18-35mm F1.8 DC HSM | A 597 = Sigma 200-500mm F2.8 APO EX DG 256 = Sigma 105mm F2.8 EX Macro 668 = Sigma 17-70mm F2.8-4 DC Macro OS HSM 257 = Sigma 105mm F2.8 EX DG Macro 686 = Sigma 50-200mm F4-5.6 DC OS HSM 258 = Sigma 105mm F2.8 EX DG OS HSM Macro 691 = Sigma 50-150mm F2.8 EX DC APO HSM II 270 = Sigma 70mm F2.8 EX DG Macro 692 = Sigma APO 50-150mm F2.8 EX DC OS HSM 300 = Sigma 30mm F1.4 EX DC HSM 728 = Sigma 120-400mm F4.5-5.6 DG APO OS HSM 301 = Sigma 30mm F1.4 DC HSM | A 737 = Sigma 150-500mm F5-6.3 APO DG OS HSM 310 = Sigma 50mm F1.4 EX DG HSM 738 = Sigma 50-500mm F4.5-6.3 APO DG OS HSM 311 = Sigma 50mm F1.4 DG HSM | A 824 = Sigma 1.4X Teleconverter EX APO DG 320 = Sigma 85mm F1.4 EX DG HSM 853 = Sigma 18-125mm F3.8-5.6 DC OS HSM 330 = Sigma 30mm F2.8 EX DN 861 = Sigma 18-50mm F2.8-4.5 DC OS HSM 340 = Sigma 35mm F1.4 DG HSM 876 = Sigma 2.0X Teleconverter EX APO DG 345 = Sigma 50mm F2.8 EX Macro 880 = Sigma 18-250mm F3.5-6.3 DC OS HSM 346 = Sigma 50mm F2.8 EX DG Macro 882 = Sigma 18-200mm F3.5-6.3 II DC OS HSM 400 = Sigma 9mm F2.8 EX DN 883 = Sigma 18-250mm F3.5-6.3 DC Macro OS HSM 401 = Sigma 24mm F1.4 DG HSM | A 1003 = Sigma 19mm F2.8 411 = Sigma 20mm F1.8 EX DG ASP RF 1004 = Sigma 30mm F2.8 432 = Sigma 24mm F1.8 EX DG ASP Macro 1005 = Sigma 50mm F2.8 Macro 440 = Sigma 28mm F1.8 EX DG ASP Macro 1006 = Sigma 19mm F2.8 461 = Sigma 14mm F2.8 EX ASP HSM 1007 = Sigma 30mm F2.8 475 = Sigma 15mm F2.8 EX Diagonal FishEye 1008 = Sigma 50mm F2.8 Macro 476 = Sigma 15mm F2.8 EX DG Diagonal Fisheye 1009 = Sigma 14mm F4 477 = Sigma 10mm F2.8 EX DC HSM Fisheye 8900 = Sigma 70-300mm F4-5.6 DG OS 483 = Sigma 8mm F4 EX Circular Fisheye '5A8' = Sigma 70-300mm F4-5.6 APO DG Macro (Motorized) 484 = Sigma 8mm F4 EX DG Circular Fisheye '5A9' = Sigma 70-300mm F4-5.6 DG Macro (Motorized) 485 = Sigma 8mm F3.5 EX DG Circular Fisheye 'A100' = Sigma 24-70mm F2.8 DG Macro