Feature #1008
Tamron 24-70mm wrongly detected as Sigma 24-70mm
Start date:
15 Dec 2014
Due date:
% Done:
0%
Estimated time:
Description
Dear all,
my Tamron SP 24-70mm f/2.8 Di VC USD lens is currently detected as Sigma 24-70mm f/2.8 IF EX DG HSM. I'm not sure if this is solvable since both seem to somehow have the same Lens ID but also have the same focal length if I read this correctly:
trunk/src/canonmn.cpp:
[...]
//! LensType, tag 0x0016
extern const TagDetails canonCsLensType[] = {
[...]
{ 137, "Sigma 24-70mm f/2.8 IF EX DG HSM" }, // 4
{ 137, "Tamron SP 24-70mm f/2.8 Di VC USD" }, // 14
[...]
}
Is there a way to work around this issue? It's very tiresome to always have to select the correct lens by hand in darktable for the lens correction to work...
Here the full exiv2 dump of a CR2 file recorded with this lens on a Canon EOS 550D (Rebel T2i)
$ exiv2 -pt IMG_1041.CR2 Exif.Image.ImageWidth Short 1 5184 Exif.Image.ImageLength Short 1 3456 Exif.Image.BitsPerSample Short 3 8 8 8 Exif.Image.Compression Short 1 JPEG (old-style) Exif.Image.Make Ascii 6 Canon Exif.Image.Model Ascii 15 Canon EOS 550D Exif.Image.StripOffsets Long 1 58984 Exif.Image.Orientation Short 1 top, left Exif.Image.StripByteCounts Long 1 1401983 Exif.Image.XResolution Rational 1 72 Exif.Image.YResolution Rational 1 72 Exif.Image.ResolutionUnit Short 1 inch Exif.Image.DateTime Ascii 20 2014:12:07 13:56:27 Exif.Image.Artist Ascii 16 Simon Spannagel Exif.Image.Copyright Ascii 1 Exif.Image.ExifTag Long 1 422 Exif.Photo.ExposureTime Rational 1 1/80 s Exif.Photo.FNumber Rational 1 F2.8 Exif.Photo.ExposureProgram Short 1 Shutter priority Exif.Photo.ISOSpeedRatings Short 1 800 Exif.Photo.ExifVersion Undefined 4 2.21 Exif.Photo.DateTimeOriginal Ascii 20 2014:12:07 13:56:27 Exif.Photo.DateTimeDigitized Ascii 20 2014:12:07 13:56:27 Exif.Photo.ComponentsConfiguration Undefined 4 YCbCr Exif.Photo.ShutterSpeedValue SRational 1 1/83 s Exif.Photo.ApertureValue Rational 1 F2.8 Exif.Photo.ExposureBiasValue SRational 1 -1/3 EV Exif.Photo.MeteringMode Short 1 Multi-segment Exif.Photo.Flash Short 1 No, compulsory Exif.Photo.FocalLength Rational 1 70.0 mm Exif.Photo.MakerNote Undefined 44926 (Binary value suppressed) Exif.MakerNote.Offset Long 1 888 Exif.MakerNote.ByteOrder Ascii 3 II Exif.CanonCs.Macro Short 1 Off Exif.CanonCs.Selftimer Short 1 Off Exif.CanonCs.Quality Short 1 RAW Exif.CanonCs.FlashMode Short 1 Off Exif.CanonCs.DriveMode Short 1 Continuous Exif.CanonCs.FocusMode Short 1 One shot AF Exif.CanonCs.ImageSize Short 1 Large Exif.CanonCs.EasyMode Short 1 Manual Exif.CanonCs.DigitalZoom Short 1 None Exif.CanonCs.Contrast Short 1 Normal Exif.CanonCs.Saturation Short 1 Normal Exif.CanonCs.Sharpness Short 1 (32767) Exif.CanonCs.ISOSpeed Short 1 (32767) Exif.CanonCs.MeteringMode Short 1 Evaluative Exif.CanonCs.FocusType Short 1 Not known Exif.CanonCs.AFPoint Short 1 (0) Exif.CanonCs.ExposureProgram Short 1 Shutter priority (Tv) Exif.CanonCs.LensType Short 1 Sigma 24-70mm f/2.8 IF EX DG HSM Exif.CanonCs.Lens Short 3 24.0 - 70.0 mm Exif.CanonCs.MaxAperture Short 1 F2.8 Exif.CanonCs.MinAperture Short 1 F23 Exif.CanonCs.FlashActivity Short 1 Did not fire Exif.CanonCs.FlashDetails Short 1 Exif.CanonCs.FocusContinuous Short 1 (65535) Exif.CanonCs.AESetting Short 1 (65535) Exif.CanonCs.ImageStabilization Short 1 (65535) Exif.CanonCs.DisplayAperture Short 1 0 Exif.CanonCs.ZoomSourceWidth Short 1 0 Exif.CanonCs.ZoomTargetWidth Short 1 0 Exif.CanonCs.SpotMeteringMode Short 1 (65535) Exif.CanonCs.PhotoEffect Short 1 (65535) Exif.CanonCs.ManualFlashOutput Short 1 n/a Exif.CanonCs.ColorTone Short 1 0 Exif.CanonCs.SRAWQuality Short 1 n/a Exif.Canon.FocalLength Short 4 70.0 mm Exif.CanonSi.ISOSpeed Short 1 800 Exif.CanonSi.MeasuredEV Short 1 2052.00 Exif.CanonSi.TargetAperture Short 1 F2.8 Exif.CanonSi.TargetShutterSpeed Short 1 1/81 s Exif.CanonSi.WhiteBalance Short 1 Auto Exif.CanonSi.Sequence Short 1 0 Exif.CanonSi.AFPointUsed Short 1 0 focus points; none used Exif.CanonSi.FlashBias Short 1 0 EV Exif.CanonSi.SubjectDistance Short 1 0 Exif.CanonSi.ApertureValue Short 1 F2.8 Exif.CanonSi.ShutterSpeedValue Short 1 1/81 s Exif.CanonSi.MeasuredEV2 Short 1 3.88 Exif.Canon.ImageType Ascii 15 Canon EOS 550D Exif.Canon.FirmwareVersion Ascii 24 Firmware Version 1.0.9 Exif.Canon.OwnerName Ascii 32 Exif.Canon.SerialNumber Long 1 379205247 Exif.Canon.CameraInfo Undefined 1536 (Binary value suppressed) Exif.Canon.ModelID Long 1 EOS Rebel T2i / 550D / Kiss X4 Exif.Canon.ThumbnailImageValidArea Short 4 0 159 7 112 Exif.Canon.SerialNumberFormat Long 1 Format 2 Exif.Canon.AFInfo Short 48 96 2 9 9 5184 3456 5184 3456 129 129 129 181 222 181 129 129 129 172 172 172 117 221 117 172 172 172 64173 64717 64717 0 0 0 819 819 1363 0 387 65149 729 0 64807 387 65149 0 16 16 0 65535 Exif.Canon.OriginalDecisionDataOffset Long 1 0 Exif.CanonFi.FileNumber Long 1 (0) Exif.CanonFi.BracketMode SShort 1 Off Exif.CanonFi.BracketValue SShort 1 0 Exif.CanonFi.BracketShotNumber SShort 1 0 Exif.CanonFi.RawJpgQuality SShort 1 (0) Exif.CanonFi.RawJpgSize SShort 1 Large Exif.CanonFi.NoiseReduction SShort 1 Off Exif.CanonFi.WBBracketMode SShort 1 Off Exif.CanonFi.WBBracketValueAB SShort 1 0 Exif.CanonFi.WBBracketValueGM SShort 1 0 Exif.CanonFi.FilterEffect SShort 1 (-1) Exif.CanonFi.ToningEffect SShort 1 (-1) Exif.CanonFi.MacroMagnification SShort 1 87 Exif.CanonFi.LiveViewShooting SShort 1 Off Exif.CanonFi.FlashExposureLock SShort 1 Off Exif.Canon.LensModel Ascii 70 24-70mm Exif.Canon.InternalSerialNumber Ascii 16 VA0870960 Exif.Canon.DustRemovalData Undefined 1024 (Binary value suppressed) Exif.Canon.CustomFunctions Long 50 200 4 1 44 3 257 1 0 259 1 0 271 1 0 2 44 3 513 1 0 514 1 0 515 1 0 3 32 2 1294 1 1 1551 1 0 4 56 4 1793 1 0 1796 1 0 2065 1 0 2063 1 0 Exif.CanonPr.ToneCurve SShort 1 Standard Exif.CanonPr.Sharpness SShort 1 3 Exif.CanonPr.SharpnessFrequency SShort 1 n/a Exif.CanonPr.SensorRedLevel SShort 1 0 Exif.CanonPr.SensorBlueLevel SShort 1 0 Exif.CanonPr.WhiteBalanceRed SShort 1 0 Exif.CanonPr.WhiteBalanceBlue SShort 1 0 Exif.CanonPr.WhiteBalance SShort 1 (-1) Exif.CanonPr.ColorTemperature SShort 1 4700 Exif.CanonPr.PictureStyle SShort 1 Standard Exif.CanonPr.DigitalGain SShort 1 0 Exif.CanonPr.WBShiftAB SShort 1 0 Exif.CanonPr.WBShiftGM SShort 1 0 Exif.Canon.MeasuredColor Short 6 12 701 1024 1024 537 1 Exif.Canon.ColorSpace Short 1 sRGB Exif.Canon.VRDOffset Long 1 0 Exif.Canon.SensorInfo Short 17 34 5344 3516 1 1 152 56 5335 3511 0 0 0 0 0 0 0 0 Exif.Photo.UserComment Undefined 264 (Binary value suppressed) Exif.Photo.SubSecTime Ascii 3 59 Exif.Photo.SubSecTimeOriginal Ascii 3 59 Exif.Photo.SubSecTimeDigitized Ascii 3 59 Exif.Photo.FlashpixVersion Undefined 4 1.00 Exif.Photo.ColorSpace Short 1 sRGB Exif.Photo.PixelXDimension Short 1 5184 Exif.Photo.PixelYDimension Short 1 3456 Exif.Photo.InteroperabilityTag Long 1 46078 Exif.Iop.InteroperabilityIndex Ascii 4 R98 Exif.Iop.InteroperabilityVersion Undefined 4 1.00 Exif.Photo.FocalPlaneXResolution Rational 1 5728.18 Exif.Photo.FocalPlaneYResolution Rational 1 5808.4 Exif.Photo.FocalPlaneResolutionUnit Short 1 inch Exif.Photo.CustomRendered Short 1 Normal process Exif.Photo.ExposureMode Short 1 Auto Exif.Photo.WhiteBalance Short 1 Auto Exif.Photo.SceneCaptureType Short 1 Standard Exif.Thumbnail.JPEGInterchangeFormat Long 1 46436 Exif.Thumbnail.JPEGInterchangeFormatLength Long 1 12546 Exif.Image2.ImageWidth Short 1 668 Exif.Image2.ImageLength Short 1 432 Exif.Image2.BitsPerSample Short 3 16 16 16 Exif.Image2.Compression Short 1 Uncompressed Exif.Image2.PhotometricInterpretation Short 1 RGB Exif.Image2.StripOffsets Long 1 1460968 Exif.Image2.SamplesPerPixel Short 1 3 Exif.Image2.RowsPerStrip Short 1 432 Exif.Image2.StripByteCounts Long 1 1731456 Exif.Image2.PlanarConfiguration Short 1 1 Exif.Image3.Compression Short 1 JPEG (old-style) Exif.Image3.StripOffsets Long 1 3197672 Exif.Image3.StripByteCounts Long 1 18705330
Files
History
Updated by Niels Kristian Bech Jensen almost 7 years ago
- Tracker changed from Bug to Feature
- Category set to metadata
- Status changed from New to Assigned
- Assignee set to Niels Kristian Bech Jensen
- Priority changed from Normal to Low
- Target version set to 1.0
There is currently no way to fix this since the two lenses have the same lens ID, focal lengths and apertures.
Best regards,
Niels Kristian Bech Jensen
Updated by Simon Spannagel almost 7 years ago
What does "currently" mean? Can that change at all in the future?
Otherwise I'll just compile my own exiv2 version removing the Sigma lens...
Updated by Niels Kristian Bech Jensen almost 7 years ago
"Currently" means that with our current knowledge we cannot fix this. There is always the possibility that we learn how to decode more metadata tags.
We are also discussing the addition of user input to prefer one lens in cases like this, but that is not just around the corner.
Best regards,
Niels Kristian Bech Jensen
Updated by Robin Mills almost 7 years ago
- Status changed from Assigned to Resolved
- Priority changed from Low to Normal
- Target version changed from 1.0 to 0.25
I'm going to mark this as "resolved" as there is nothing else we can do about this at the current time.
Robin
Updated by Simon Spannagel almost 7 years ago
- File IMG_1611.CR2 IMG_1611.CR2 added
- File IMG_1612.CR2 IMG_1612.CR2 added
Updated by Simon Spannagel almost 7 years ago
Added sample files as requested by Iliah Borg of LibRaw. 1611 is taken with the Tamron lens, 1612 with the Canon 18-55mm IS Kit Lens.