[madison_wi_gal]

Last thread for today, need to get off computer.

This has been discussed before, but last thread was updated 6 years ago so wondering if new info.

Maybe it doesn't matter, but I can't get a good feel for what EXIF data gets figured out by Flickr vs. what is seen in Pentax Forum uploads, or if DCU is stripping lens info.

Example: I took a RAW image and passed it through DCU. Uploaded (as processed jpg) to Flickr and also to PF Gallery.

I also exported the same RAW directly out of OS X "Photos" (no pp) and saved as highest quality jpeg on Flickr.

So, it appears that DCU stripped out the lens info as far as Flickr is concerned, but not as far as PF is concerned.

Do I care? Maybe not, but lens info might help Flickr users.


********* UPDATE*************

I *just now* took a pic and passed it through DCU. Flickr here and PF here.

DCU is definitely doing something that confuses Flickr.

So... maybe not use DCU?

---

Last edited by madison_wi_gal; 05-15-2022 at 12:10 PM. Reason: added info

[pschlute]

Flickr will honour the exif for lens data, as long as the software version you are using (DCU) is up to date to recognise the lens in question.

[madison_wi_gal]

But that is the weird thing. DCU *does* recognize the lens.

this is Flickr implementation:

Below is DCU

[Des]

Pentax cameras write the lens information (in the form of numeric codes) to the Maker Notes rather than EXIF part of the metadata. Flickr reads lens information from EXIF.

Some PP software will write the lens information to EXIF in the output image, some won't. DCU doesn't. It isn't stripping any information, it's just not adding it to where Flickr looks for it.

You can use EXIFtool to import the lens information into EXIF before uploading to Flickr. EXIFTool It can do a batch or individual files.

Have a look at this thread and the threads linked from there: Saving Lens Information in Meta Data - PentaxForums.com

[madison_wi_gal]

Pentax cameras write the lens information (in the form of numeric codes) to the Maker Notes rather than EXIF part of the metadata. Flickr reads lens information from EXIF.

Some PP software will write the lens information to EXIF in the output image, some won't. DCU doesn't. It isn't stripping any information, it's just not adding it to where Flickr looks for it.

You can use EXIFtool to import the lens information into EXIF before uploading to Flickr. EXIFTool It can do a batch or individual files.

Have a look at this thread and the threads linked from there: Saving Lens Information in Meta Data - PentaxForums.com

Thanks, for the purposes of post processing I am a Mac user so the Exif tool is not going to work for me unless I use the command line one. Maybe I'm worrying too much about what Flickr sees. at least now I know the explanation so thank you for that.

[pschlute]

Some PP software will write the lens information to EXIF in the output image, some won't. DCU doesn't.

Thanks for that information, I have learned something new.

I use Silkypix DSPro or Adobe Camera Raw for my raw processing. In both cases the lens data is displayed by Flickr, below where it details the camera used, and in the EXIF. So I guess both these programs are doing as you suggest.

[jersey]

Command line exiftool is easy. You just go to terminal, enter catalog you have photos and type: exiftool "-lenstype<lensmodel" * and it will go thorough all images in the catalog and make lens data where it should be. Best to do it on RAW files before you start developement. Then DCU (or any other program) will export them properly when creating JPEG.

[pschlute]

One nice touch about Silkypix DSPro is that for a lens which is not in it's database, you can edit the lens ID to add it. The best part is that for any subsequent (or precedent) file of the same lens, this setting is remembered, so the process only needs to be done once.

[madison_wi_gal]

Command line exiftool is easy. You just go to terminal, enter catalog you have photos and type: exiftool "-lenstype<lensmodel" * and it will go thorough all images in the catalog and make lens data where it should be. Best to do it on RAW files before you start developement. Then DCU (or any other program) will export them properly when creating JPEG.

Bingo! I am fine with terminal commands.

---------- Post added 05-16-22 at 11:22 ----------

Command line exiftool is easy. You just go to terminal, enter catalog you have photos and type: exiftool "-lenstype<lensmodel" * and it will go thorough all images in the catalog and make lens data where it should be. Best to do it on RAW files before you start developement. Then DCU (or any other program) will export them properly when creating JPEG.

Warning: No writable tags set from IMGP1642.DNG. <-- getting this on all (names different). EXIF data does exist.

[kypfer]

Bingo! I am fine with terminal commands.

---------- Post added 05-16-22 at 11:22 ----------



Warning: No writable tags set from IMGP1642.DNG. <-- getting this on all (names different). EXIF data does exist.

Dunno if the Mac version is different to the Windows version, but under W10 there's a space in the tags viz. :- "Lens Type" not "lenstype"
Lens Model is probably the same.

[jersey]

Try to get them other way around: -lensmodel<lenstype

[Des]

I use Silkypix DSPro or Adobe Camera Raw for my raw processing. In both cases the lens data is displayed by Flickr, below where it details the camera used, and in the EXIF. So I guess both these programs are doing as you suggest.

Sounds like it Peter. I use DxO PhotoLab which just started doing this in version 4.

Incidentally, one qualification to what I said above. PL writes the lens info to XMP rather than EXIF, but Flickr reads that too.

One nice touch about Silkypix DSPro is that for a lens which is not in it's database, you can edit the lens ID to add it.

It would be nice if all PP software had that capability. I use ExifToolGui to do that (for anyone interested the procedure is described in the thread linked to above).

[kypfer]

Try to get them other way around: -lensmodel<lenstype

Well done … that works!

[madison_wi_gal]

So, if I query (exiftool -s filename) a DNG, I see: LensType and LensID


ExifToolVersion : 12.41
FileName : IMGP7202.DNG
Directory : .
FileSize : 15 MiB
FileModifyDate : 2022:05:16 11:20:50-05:00
FileAccessDate : 2022:05:16 11:20:52-05:00
FileInodeChangeDate : 2022:05:16 11:20:50-05:00
FilePermissions : -rw-------
FileType : DNG
FileTypeExtension : dng
MIMEType : image/x-adobe-dng
ExifByteOrder : Big-endian (Motorola, MM)
Make : PENTAX
Model : PENTAX K-r
Orientation : Horizontal (normal)
Software : K-r Ver 1.15
ModifyDate : 2020:03:15 18:22:34
Artist :
ImageWidth : 4352
ImageHeight : 2868
BitsPerSample : 12
Compression : JPEG
PhotometricInterpretation : Color Filter Array
StripOffsets : 162048
SamplesPerPixel : 1
RowsPerStrip : 2868
StripByteCounts : 13889184
XResolution : 300
YResolution : 300
PlanarConfiguration : Chunky
ResolutionUnit : inches
CFARepeatPatternDim : 2 2
CFAPattern2 : 2 1 1 0
CFALayout : Rectangular
BlackLevelRepeatDim : 2 2
BlackLevel : 125 129 129 125
DefaultScale : 1 1
DefaultCropOrigin : 10 10
DefaultCropSize : 4288 2848
BayerGreenSplit : 0
AntiAliasStrength : 1
SubfileType : Reduced-resolution image
PrimaryChromaticities : 0.64 0.33 0.3 0.6 0.15 0.06
YCbCrCoefficients : 0.299 0.587 0.114
YCbCrSubSampling : YCbCr4:2:2 (2 1)
YCbCrPositioning : Co-sited
Copyright :
ExposureTime : 1/250
FNumber : 5.6
ExposureProgram : Program AE
DateTimeOriginal : 2020:03:15 18:22:34
CreateDate : 2020:03:15 18:22:34
Flash : Off, Did not fire
FocalLength : 31.0 mm
SensingMethod : One-chip color area
CustomRendered : Normal
ExposureMode : Auto
FocalLengthIn35mmFormat : 46 mm
SceneCaptureType : Standard
SubjectDistanceRange : Close
GPSVersionID : 2.3.0.0
DNGVersion : 1.1.0.0
DNGBackwardVersion : 1.1.0.0
UniqueCameraModel : PENTAX K-r
ColorMatrix1 : 1.160903931 -0.5602416992 -0.1414489746 -0.5094604492 1.231018066 0.3154144287 -0.03727722168 0.05737304688 0.7194213867
ColorMatrix2 : 1.035018921 -0.3027801514 -0.1502380371 -0.5856933594 1.444366455 0.1459503174 -0.1687927246 0.2328338623 0.7187347412
AnalogBalance : 1 1 1
AsShotNeutral : 0.4563279857 1 0.8590604027
BaselineExposure : -0.5463409424
BaselineNoise : 1
BaselineSharpness : 1
LinearResponseLimit : 1
PentaxVersion : 7.0.0.0
PentaxModelType : 0
PreviewImageSize : 640x480
PreviewImageLength : 24565
PreviewImageStart : 35264
PentaxModelID : K-r
Date : 2020:03:15
Time : 18:22:34
Quality : RAW
FlashMode : Off, Did not fire; Internal
FocusMode : AF-A (Focus-priority)
AFPointSelected : Auto
ISO : 800
ExposureCompensation : 0
MeteringMode : Spot
AutoBracketing : 0 EV, No Extended Bracket
WhiteBalance : Auto
Saturation : 0 (normal)
Contrast : +1 (medium high)
Sharpness : +1 (medium hard)
DSPFirmwareVersion : 1.15.24.21
CPUFirmwareVersion : 1.15.24.21
EffectiveLV : 10.1
PictureMode : Auto PICT (Standard); 1/3 EV steps
DriveMode : Single-frame; No Timer; Shutter Button; Single Exposure
SensorSize : 24.106 x 16.010 mm
ColorSpace : sRGB
ImageAreaOffset : 10 10
RawImageSize : 4288x2848
DataScaling : 8192
PreviewImageBorders : 28 28 0 0
LensType : smc PENTAX-DA 18-135mm F3.5-5.6 ED AL [IF] DC WR
ExtenderStatus : Not attached
CameraTemperature : 14 C
AELock : Off
NoiseReduction : Off
FlashExposureComp : 0
ImageTone : Bright
SRResult : Not ready
ShakeReduction : On (7)
SRHalfPressTime : 0.00 s
SRFocalLength : 31 mm
ShutterCount : 7287
FacesDetected : 0
FacePosition : 0 0
RawDevelopmentProcess : 7 (K-r)
Hue : Normal
WhiteBalanceAutoAdjustment : On
TungstenAWB : Subtle Correction
DynamicRangeExpansion : Off; 0; 0; 0
WorldTimeLocation : Hometown
HometownDST : Yes
DestinationDST : Yes
HometownCity : Chicago
DestinationCity : Miami
HighLowKeyAdj : 0
FineSharpness : Off; Normal
HighISONoiseReduction : Auto; Active (Weak)
AFAdjustment : 0
MonochromeFilterEffect : None
MonochromeToning : None
FaceDetect : Off; 0 faces detected
FaceDetectFrameSize : 0 0
ShadowCorrection : Off
DistortionCorrection : Off
ChromaticAberrationCorrection : Off
PeripheralIlluminationCorr : Off
WhiteLevel : 3965
BleachBypassToning : n/a
BlackPoint : 125 129 129 125
WhitePoint : 17952 8192 8192 9536
PictureMode2 : Auto PICT
ProgramLine : Normal
E-DialInProgram : P Shift
ApertureRingUse : Permitted
FlashOptions : Normal
MeteringMode2 : Spot
AFPointMode : Auto
FocusMode2 : AF-A
AFPointSelected2 : Auto
ISOFloor : 800
DriveMode2 : Single-frame
ExposureBracketStepSize : 0.5
BracketShotNumber : n/a
WhiteBalanceSet : Auto
MultipleExposureSet : Off
AEExposureTime : 1/241
AEAperture : 5.9
AE_ISO : 800
AEXv : 0
AEBXv : 0
AEMinExposureTime : 1/5461
AEProgramMode : Standard
AEApertureSteps : 7
AEMaxAperture : 4.8
AEMaxAperture2 : 4.2
AEMinAperture : 32
AEMeteringMode : Spot
FlashExposureCompSet : 0
LevelIndicator : 0
MinFocusDistance : 0.40-0.45 m
FocusRangeIndex : 4
LensFocalLength : 31.2 mm
NominalMaxAperture : 4.8
NominalMinAperture : 32
MaxAperture : 4.2
AEMeteringSegments : 9.1 9.4 9.4 9.2 9.1 9.0 9.4 9.8 9.8 9.8 10.1 10.8 10.2 11.1 9.2 10.9
FlashMeteringSegments : 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
SlaveFlashMeteringSegments : 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
ManufactureDate : 2010:12:14
ProductionCode : 2.1
InternalSerialNumber : 8412014
PowerSource : Body Battery
BodyBatteryState : Almost Empty
BodyBatteryVoltage1 : 7.85 V
BodyBatteryVoltage2 : 6.66 V
BodyBatteryVoltage3 : 8.28 V
BodyBatteryVoltage4 : 6.80 V
ColorMatrixA2 : 5857 2334 0 0 8192 0 0 335 7856
ColorMatrixB2 : 13952 -4416 -1344 -1472 13792 -4128 128 -2816 10880
AFPredictor : -12
AFDefocus : 8
AFIntegrationTime : 6 ms
AFPointsInFocus : Center (horizontal)
KelvinWB_Daylight : 5205 0 1.7210693359375 1.2412109375
KelvinWB_01 : 2500 0 0.9564208984375 2.518798828125
KelvinWB_02 : 2630 0 1.0106201171875 2.357177734375
KelvinWB_03 : 2780 0 1.07080078125 2.199951171875
KelvinWB_04 : 2940 0 1.1318359375 2.058837890625
KelvinWB_05 : 3130 0 1.2003173828125 1.9193115234375
KelvinWB_06 : 3330 0 1.2679443359375 1.797607421875
KelvinWB_07 : 3570 0 1.3431396484375 1.6771240234375
KelvinWB_08 : 3850 0 1.423583984375 1.563720703125
KelvinWB_09 : 4170 0 1.5067138671875 1.460205078125
KelvinWB_10 : 4550 0 1.594482421875 1.3631591796875
KelvinWB_11 : 5000 0 1.6849365234375 1.2744140625
KelvinWB_12 : 5560 0 1.7806396484375 1.1900634765625
KelvinWB_13 : 6250 0 1.877685546875 1.11376953125
KelvinWB_14 : 7140 0 1.976806640625 1.0428466796875
KelvinWB_15 : 8330 0 2.076904296875 0.9779052734375
KelvinWB_16 : 10000 0 2.175537109375 0.9195556640625
WBShiftAB : 0
WBShiftGM : 0
EVSteps : 1/3 EV Steps
SensitivitySteps : 1 EV Steps
CameraOrientation : Horizontal (normal)
SerialNumber : 3972632
LevelOrientation : Horizontal (normal)
CompositionAdjust : Off
RollAngle : 0
PitchAngle : 0
CompositionAdjustX : 0
CompositionAdjustY : 0
CompositionAdjustRotation : 0
WB_RGGBLevelsDaylight : 15137 8192 8192 11722
WB_RGGBLevelsShade : 17960 8192 8192 8624
WB_RGGBLevelsCloudy : 16195 8192 8192 9880
WB_RGGBLevelsTungsten : 9033 8192 8192 21435
WB_RGGBLevelsFluorescentD : 18559 8192 8192 11136
WB_RGGBLevelsFluorescentN : 15913 8192 8192 12392
WB_RGGBLevelsFluorescentW : 14466 8192 8192 15322
WB_RGGBLevelsFlash : 17042 8192 8192 10633
WB_RGGBLevelsFluorescentL : 12102 8192 8192 19174
WB_RGGBLevelsUserSelected : 15137 8192 8192 11722
ContrastDetectAFArea : 0 0 0 0
CalibrationIlluminant1 : Standard Light A
CalibrationIlluminant2 : D65
Aperture : 5.6
CFAPattern : [Blue,Green][Green,Red]
ImageSize : 4352x2868
LensID : smc PENTAX-DA 18-135mm F3.5-5.6 ED AL [IF] DC WR
Megapixels : 12.5
PreviewImage : (Binary data 24565 bytes, use -b option to extract)
ScaleFactor35efl : 1.5
ShutterSpeed : 1/250
ThumbnailTIFF : (Binary data 57816 bytes, use -b option to extract)
CircleOfConfusion : 0.020 mm
FOV : 42.7 deg
FocalLength35efl : 31.0 mm (35 mm equivalent: 46.0 mm)
HyperfocalDistance : 8.48 m
LightValue


*********

AND: PENTAX % exiftool "-lensmodel<lenstype" *
1 directories scanned
11 image files updated

It worked! Now it reads:

SubjectDistanceRange : Close
LensModel : smc PENTAX-DA 18-135mm F3.5-5.6 ED AL [IF] DC WR
GPSVersionID : 2.3.0.0