Re: [darktable-dev] DNG vs RAW → Lens and focus info
Hi Timur, On 04.04.2018 21:06, Timur Irikovich Davletshin wrote: > 1. DT relies only on libexiv2 in extraction of EXIF metadata. > 2. exiv2 fails to extract vendor specific information from DNG file > (converted via Adobe DNG Converter) when compared with exiftool. But > original NEF data is there. > 3. As last resort for lens detection DT relies on Exif.Photo.LensModel, > which is just ASCII string encoded by converter. > 4. Converter writes ambiguous data in Exif.Photo.LensModel without. No > vendor, no exact model, just '18.0-55.0 mm f/3.5-5.6'. > 5. Feeding vague data to lensfun gives no good results. > 6. Native DNG by Pentax use non-standard vendor specific Exif.Pentax* > namespace. > 7. Focus distance information is also vendor specific. > > If not mistaken problem should be fixed on very root... which is > libexiv2. But it's just MHO. I didn't check it, but that sounds like the right direction. I guess it could be confirmed by dumping the metadata using the libexiv2 command line tool (exiv2) and comparing the output to what exiftool gives. cheers, Simon ___ darktable developer mailing list to unsubscribe send a mail to darktable-dev+unsubscr...@lists.darktable.org
Re: [darktable-dev] DNG vs RAW → Lens and focus info
On Wed, 2018-04-04 at 13:36 +0200, Tobias Ellinghaus wrote: > Am Mittwoch, 4. April 2018, 13:15:39 CEST schrieb Timur Irikovich > Davletshin: > > Hello everybody! > > > > Just decided to play with DNG converter and discovered problem > > related > > to lens data interpretation by DT (2.4.2). > > > > 1. NEF file loaded by DT applies correct lens parameters. > > Lens info shown by DT: Nikon AF-S DX Nikkor 18-55mm f/3.5-5.6G > > VR II > > > > 2. DNG file cannot apply it because wrong EXIF information is used > > (short lens name vs. full). > > Lens info shown by DT: 18.0-55.0 mm f/3.5-5.6 > > > > 3. Focus information also is lost in DNG. > > That's why we tell everyone to never convert to DNG. > > Tobias > > [...] So, after little digging I found following (correct me if I'm wrong): 1. DT relies only on libexiv2 in extraction of EXIF metadata. 2. exiv2 fails to extract vendor specific information from DNG file (converted via Adobe DNG Converter) when compared with exiftool. But original NEF data is there. 3. As last resort for lens detection DT relies on Exif.Photo.LensModel, which is just ASCII string encoded by converter. 4. Converter writes ambiguous data in Exif.Photo.LensModel without. No vendor, no exact model, just '18.0-55.0 mm f/3.5-5.6'. 5. Feeding vague data to lensfun gives no good results. 6. Native DNG by Pentax use non-standard vendor specific Exif.Pentax* namespace. 7. Focus distance information is also vendor specific. If not mistaken problem should be fixed on very root... which is libexiv2. But it's just MHO. ___ darktable developer mailing list to unsubscribe send a mail to darktable-dev+unsubscr...@lists.darktable.org
[darktable-dev] Re: [darktable-dev] DNG vs RAW → Lens and focus info
A bug in DTs metadata reader is not a good argument for your cause. ;) On April 4, 2018 13:36:36 Tobias Ellinghaus wrote: Am Mittwoch, 4. April 2018, 13:15:39 CEST schrieb Timur Irikovich Davletshin: > Hello everybody! > > Just decided to play with DNG converter and discovered problem related > to lens data interpretation by DT (2.4.2). > > 1. NEF file loaded by DT applies correct lens parameters. >Lens info shown by DT: Nikon AF-S DX Nikkor 18-55mm f/3.5-5.6G > VR II > > 2. DNG file cannot apply it because wrong EXIF information is used > (short lens name vs. full). >Lens info shown by DT: 18.0-55.0 mm f/3.5-5.6 > > 3. Focus information also is lost in DNG. That's why we tell everyone to never convert to DNG. Tobias [...] ___ darktable developer mailing list to unsubscribe send a mail to darktable-dev+unsubscr...@lists.darktable.org
Re: [darktable-dev] DNG vs RAW → Lens and focus info
On Wed, 2018-04-04 at 16:09 +0200, sturmflut wrote: > Hello Timur, > > On 04.04.2018 13:15, Timur Irikovich Davletshin wrote: > > > Simple investigation with exiftool shows that no lens information > > is > > lost in DNG. > > I guess if the data is there and exiftool sees the same values in > both > files, but different things happen later on, that would point in the > direction of exiv2/liblensfun? > > cheers, > Simon > _ > __ > darktable developer mailing list > to unsubscribe send a mailCanon Model ID to darktable- > dev+unsubscr...@lists.darktable.org > Probably but as for me (mere DT user) it looks like in case of DNG wrong EXIF lines are used (both for Canon and Nikon). E.g. 'Lens ID' is used in case of NEF/CR2 and 'Lens Spec' in case of DNG. Lensfun is not flexible enough to find match in case of Nikon lens. Notice how information changes (NEF → DNG) in image information (file attached). ___ darktable developer mailing list to unsubscribe send a mail to darktable-dev+unsubscr...@lists.darktable.org
Re: [darktable-dev] DNG vs RAW → Lens and focus info
On Wed, 2018-04-04 at 16:09 +0200, sturmflut wrote: > Hello Timur, > > On 04.04.2018 13:15, Timur Irikovich Davletshin wrote: > > > Simple investigation with exiftool shows that no lens information > > is > > lost in DNG. > > I guess if the data is there and exiftool sees the same values in > both > files, but different things happen later on, that would point in the > direction of exiv2/liblensfun? > > cheers, > Simon > _ > __ > darktable developer mailing list > to unsubscribe send a mailCanon Model ID to darktable- > dev+unsubscr...@lists.darktable.org > Probably but as for me (mere DT user) it looks like in case of DNG wrong EXIF lines are used (both for Canon and Nikon). E.g. 'Lens ID' is used in case of NEF/CR2 and 'Lens Spec' in case of DNG. Lensfun is not flexible enough to find match in case of Nikon lens. Notice how information changes (NEF → DNG) in image information (file attached). ___ darktable developer mailing list to unsubscribe send a mail to darktable-dev+unsubscr...@lists.darktable.org
Re: [darktable-dev] DNG vs RAW → Lens and focus info
Am Mittwoch, 4. April 2018, 15:37:29 CEST schrieb Timur Irikovich Davletshin: [...] > This is why I wrote 'native or converted' in my previous letter. Dear > Patrick, I'm not here for the purpose of your religious war against DNG > which is *not* standard. I think this is just an obvious bug which can > be easily fixed. If it's a bug easily fixed we will most likely do that. But at least I am too busy at the moment to dig into it and find that bug. > Regards, > > Timur. Tobias signature.asc Description: This is a digitally signed message part.
Re: [darktable-dev] DNG vs RAW → Lens and focus info
Tobias Ellinghaus schrieb am 04.04.2018 um 13:36: Am Mittwoch, 4. April 2018, 13:15:39 CEST schrieb Timur Irikovich Davletshin: Hello everybody! Just decided to play with DNG converter and discovered problem related to lens data interpretation by DT (2.4.2). 1. NEF file loaded by DT applies correct lens parameters. Lens info shown by DT: Nikon AF-S DX Nikkor 18-55mm f/3.5-5.6G VR II 2. DNG file cannot apply it because wrong EXIF information is used (short lens name vs. full). Lens info shown by DT: 18.0-55.0 mm f/3.5-5.6 3. Focus information also is lost in DNG. That's why we tell everyone to never convert to DNG. Tobias [...] That's the short answer. The long answer could look like this: - DNG is a RAW file format like NEF or CR2 or ORF or ... - this is true only if the file comes out-of-camera this way. The devs try to support as many RAW formats as they can - if user-provided samples are available. Many of the proprietary RAW-Formats come with different flavours based on Camera Model, Camera Settings etc. So testing this is a tremendous effort which has to be done on every (minor) release of darktable. Adding a simple RAW=>DNG converter would double this effort. But: adding more RAW=>DNG converters would multiply this effort since every proprietary flavour of any proprietary format would have to be tested against every (proprietary or not) RAW=>DNG Converter. So I totally understand the devs to care about original RAWs and not on any variant of those. [Perhaps a prominent message about this would be a good thing in the manual/list of supported cameras?] -- regards Bernhard https://www.bilddateien.de ___ darktable developer mailing list to unsubscribe send a mail to darktable-dev+unsubscr...@lists.darktable.org
Re: [darktable-dev] DNG vs RAW → Lens and focus info
Hello Timur, On 04.04.2018 13:15, Timur Irikovich Davletshin wrote: > Simple investigation with exiftool shows that no lens information is > lost in DNG. I guess if the data is there and exiftool sees the same values in both files, but different things happen later on, that would point in the direction of exiv2/liblensfun? cheers, Simon ___ darktable developer mailing list to unsubscribe send a mail to darktable-dev+unsubscr...@lists.darktable.org
Re: [darktable-dev] DNG vs RAW → Lens and focus info
On Wed, 2018-04-04 at 09:49 -0400, Patrick Shanahan wrote: > * Timur Irikovich Davletshin [04-04-18 > 09:40]: > > On Wed, 2018-04-04 at 09:27 -0400, Patrick Shanahan wrote: > > > * Timur Irikovich Davletshin [04-04- > > > 18 > > > 08:46]: > > > > On Wed, 2018-04-04 at 08:21 -0400, Patrick Shanahan wrote: > > > > > * Timur Irikovich Davletshin > > > > > [04-04- > > > > > 18 > > > > > 08:01]: > > > > > > On Wed, 2018-04-04 at 13:36 +0200, Tobias Ellinghaus wrote: > > > > > > > Am Mittwoch, 4. April 2018, 13:15:39 CEST schrieb Timur > > > > > > > Irikovich > > > > > > > Davletshin: > > > > > > > > Hello everybody! > > > > > > > > > > > > > > > > Just decided to play with DNG converter and discovered > > > > > > > > problem > > > > > > > > related > > > > > > > > to lens data interpretation by DT (2.4.2). > > > > > > > > > > > > > > > > 1. NEF file loaded by DT applies correct lens > > > > > > > > parameters. > > > > > > > > Lens info shown by DT: Nikon AF-S DX Nikkor 18- > > > > > > > > 55mm > > > > > > > > f/3.5-5.6G > > > > > > > > VR II > > > > > > > > > > > > > > > > 2. DNG file cannot apply it because wrong EXIF > > > > > > > > information > > > > > > > > is > > > > > > > > used > > > > > > > > (short lens name vs. full). > > > > > > > > Lens info shown by DT: 18.0-55.0 mm f/3.5-5.6 > > > > > > > > > > > > > > > > 3. Focus information also is lost in DNG. > > > > > > > > > > > > > > That's why we tell everyone to never convert to DNG. > > > > > > > > > > > > > > Tobias > > > > > > > > > > > > > > [...] > > > > > > > > > > > > I believe problem is Nikon/DT related not DNG. Canon files > > > > > > I > > > > > > tried > > > > > > work > > > > > > as expected. Another example Nikon D1X files converted to > > > > > > DNG > > > > > > are > > > > > > useless because there is no way turn pixel scale module on > > > > > > manually. > > > > > > > > > > simple, don't convert native files to dng. the dng format is > > > > > not > > > > > provided > > > > > by Nikon and cannot know the proprietary secrets that Nikon > > > > > uses > > > > > to > > > > > generate its raw files. dng is *not* a standard. dng makes > > > > > changes > > > > > the > > > > > the original (raw). why convert your raw twice? > > > > > > > > > > > > > DNG made from Canon, Olympus works, Nikon's doesn't... > > > > meanwhile > > > > EXIF > > > > data is there. Looks like it's not a problem of DNG itself. > > > > > > > > Whether we like it or not but DNG files (native or converted) > > > > are > > > > quite > > > > common. Especially when DT documentation declares some sort of > > > > DNG > > > > support in very first line of https://www.darktable.org/resourc > > > > es/c > > > > amer > > > > a-support/ > > > > > > do you not really read what you cite? > > > > > > Cameras that produce DNG files should be supported even if they > > > are > > > not > > > on the list but samples are still appreciated. > > > > > > says nothing about supporting dng which is not native out-of-the- > > > camera. > > > > > > > This is why I wrote 'native or converted' in my previous letter. > > Dear > > Patrick, I'm not here for the purpose of your religious war against > > DNG > > which is *not* standard. I think this is just an obvious bug which > > can > > be easily fixed. > > and I have serious doubts the dev's will be concerned as they have > repeatedly stated that altering an original raw is WRONG. why would > they > commit work to support it? > > I am not for or against dng, don't use it, don't care, don't > understand > why one would endure the extra effort and time required. your > perception, > not mine. and would only be considered a bug if that feature was to > be > supported, otherwise it would be a feature request. I appreciate your comments. ___ darktable developer mailing list to unsubscribe send a mail to darktable-dev+unsubscr...@lists.darktable.org
Re: [darktable-dev] DNG vs RAW → Lens and focus info
* Timur Irikovich Davletshin [04-04-18 09:40]: > On Wed, 2018-04-04 at 09:27 -0400, Patrick Shanahan wrote: > > * Timur Irikovich Davletshin [04-04-18 > > 08:46]: > > > On Wed, 2018-04-04 at 08:21 -0400, Patrick Shanahan wrote: > > > > * Timur Irikovich Davletshin [04-04- > > > > 18 > > > > 08:01]: > > > > > On Wed, 2018-04-04 at 13:36 +0200, Tobias Ellinghaus wrote: > > > > > > Am Mittwoch, 4. April 2018, 13:15:39 CEST schrieb Timur > > > > > > Irikovich > > > > > > Davletshin: > > > > > > > Hello everybody! > > > > > > > > > > > > > > Just decided to play with DNG converter and discovered > > > > > > > problem > > > > > > > related > > > > > > > to lens data interpretation by DT (2.4.2). > > > > > > > > > > > > > > 1. NEF file loaded by DT applies correct lens parameters. > > > > > > > Lens info shown by DT: Nikon AF-S DX Nikkor 18-55mm > > > > > > > f/3.5-5.6G > > > > > > > VR II > > > > > > > > > > > > > > 2. DNG file cannot apply it because wrong EXIF information > > > > > > > is > > > > > > > used > > > > > > > (short lens name vs. full). > > > > > > > Lens info shown by DT: 18.0-55.0 mm f/3.5-5.6 > > > > > > > > > > > > > > 3. Focus information also is lost in DNG. > > > > > > > > > > > > That's why we tell everyone to never convert to DNG. > > > > > > > > > > > > Tobias > > > > > > > > > > > > [...] > > > > > > > > > > I believe problem is Nikon/DT related not DNG. Canon files I > > > > > tried > > > > > work > > > > > as expected. Another example Nikon D1X files converted to DNG > > > > > are > > > > > useless because there is no way turn pixel scale module on > > > > > manually. > > > > > > > > simple, don't convert native files to dng. the dng format is not > > > > provided > > > > by Nikon and cannot know the proprietary secrets that Nikon uses > > > > to > > > > generate its raw files. dng is *not* a standard. dng makes > > > > changes > > > > the > > > > the original (raw). why convert your raw twice? > > > > > > > > > > DNG made from Canon, Olympus works, Nikon's doesn't... meanwhile > > > EXIF > > > data is there. Looks like it's not a problem of DNG itself. > > > > > > Whether we like it or not but DNG files (native or converted) are > > > quite > > > common. Especially when DT documentation declares some sort of DNG > > > support in very first line of https://www.darktable.org/resources/c > > > amer > > > a-support/ > > > > do you not really read what you cite? > > > > Cameras that produce DNG files should be supported even if they are > > not > > on the list but samples are still appreciated. > > > > says nothing about supporting dng which is not native out-of-the- > > camera. > > > > This is why I wrote 'native or converted' in my previous letter. Dear > Patrick, I'm not here for the purpose of your religious war against DNG > which is *not* standard. I think this is just an obvious bug which can > be easily fixed. and I have serious doubts the dev's will be concerned as they have repeatedly stated that altering an original raw is WRONG. why would they commit work to support it? I am not for or against dng, don't use it, don't care, don't understand why one would endure the extra effort and time required. your perception, not mine. and would only be considered a bug if that feature was to be supported, otherwise it would be a feature request. -- (paka)Patrick Shanahan Plainfield, Indiana, USA @ptilopteri http://en.opensuse.orgopenSUSE Community Memberfacebook/ptilopteri Registered Linux User #207535@ http://linuxcounter.net Photos: http://wahoo.no-ip.org/piwigo paka @ IRCnet freenode ___ darktable developer mailing list to unsubscribe send a mail to darktable-dev+unsubscr...@lists.darktable.org
Re: [darktable-dev] DNG vs RAW → Lens and focus info
On Wed, 2018-04-04 at 09:27 -0400, Patrick Shanahan wrote: > * Timur Irikovich Davletshin [04-04-18 > 08:46]: > > On Wed, 2018-04-04 at 08:21 -0400, Patrick Shanahan wrote: > > > * Timur Irikovich Davletshin [04-04- > > > 18 > > > 08:01]: > > > > On Wed, 2018-04-04 at 13:36 +0200, Tobias Ellinghaus wrote: > > > > > Am Mittwoch, 4. April 2018, 13:15:39 CEST schrieb Timur > > > > > Irikovich > > > > > Davletshin: > > > > > > Hello everybody! > > > > > > > > > > > > Just decided to play with DNG converter and discovered > > > > > > problem > > > > > > related > > > > > > to lens data interpretation by DT (2.4.2). > > > > > > > > > > > > 1. NEF file loaded by DT applies correct lens parameters. > > > > > > Lens info shown by DT: Nikon AF-S DX Nikkor 18-55mm > > > > > > f/3.5-5.6G > > > > > > VR II > > > > > > > > > > > > 2. DNG file cannot apply it because wrong EXIF information > > > > > > is > > > > > > used > > > > > > (short lens name vs. full). > > > > > > Lens info shown by DT: 18.0-55.0 mm f/3.5-5.6 > > > > > > > > > > > > 3. Focus information also is lost in DNG. > > > > > > > > > > That's why we tell everyone to never convert to DNG. > > > > > > > > > > Tobias > > > > > > > > > > [...] > > > > > > > > I believe problem is Nikon/DT related not DNG. Canon files I > > > > tried > > > > work > > > > as expected. Another example Nikon D1X files converted to DNG > > > > are > > > > useless because there is no way turn pixel scale module on > > > > manually. > > > > > > simple, don't convert native files to dng. the dng format is not > > > provided > > > by Nikon and cannot know the proprietary secrets that Nikon uses > > > to > > > generate its raw files. dng is *not* a standard. dng makes > > > changes > > > the > > > the original (raw). why convert your raw twice? > > > > > > > DNG made from Canon, Olympus works, Nikon's doesn't... meanwhile > > EXIF > > data is there. Looks like it's not a problem of DNG itself. > > > > Whether we like it or not but DNG files (native or converted) are > > quite > > common. Especially when DT documentation declares some sort of DNG > > support in very first line of https://www.darktable.org/resources/c > > amer > > a-support/ > > do you not really read what you cite? > > Cameras that produce DNG files should be supported even if they are > not > on the list but samples are still appreciated. > > says nothing about supporting dng which is not native out-of-the- > camera. > This is why I wrote 'native or converted' in my previous letter. Dear Patrick, I'm not here for the purpose of your religious war against DNG which is *not* standard. I think this is just an obvious bug which can be easily fixed. Regards, Timur. ___ darktable developer mailing list to unsubscribe send a mail to darktable-dev+unsubscr...@lists.darktable.org
Re: [darktable-dev] DNG vs RAW → Lens and focus info
* Timur Irikovich Davletshin [04-04-18 09:08]: > On Wed, 2018-04-04 at 08:21 -0400, Patrick Shanahan wrote: > > * Timur Irikovich Davletshin [04-04-18 > > 08:01]: > > > On Wed, 2018-04-04 at 13:36 +0200, Tobias Ellinghaus wrote: > > > > Am Mittwoch, 4. April 2018, 13:15:39 CEST schrieb Timur Irikovich > > > > Davletshin: > > > > > Hello everybody! > > > > > > > > > > Just decided to play with DNG converter and discovered problem > > > > > related > > > > > to lens data interpretation by DT (2.4.2). > > > > > > > > > > 1. NEF file loaded by DT applies correct lens parameters. > > > > > Lens info shown by DT: Nikon AF-S DX Nikkor 18-55mm > > > > > f/3.5-5.6G > > > > > VR II > > > > > > > > > > 2. DNG file cannot apply it because wrong EXIF information is > > > > > used > > > > > (short lens name vs. full). > > > > > Lens info shown by DT: 18.0-55.0 mm f/3.5-5.6 > > > > > > > > > > 3. Focus information also is lost in DNG. > > > > > > > > That's why we tell everyone to never convert to DNG. > > > > > > > > Tobias > > > > > > > > [...] > > > > > > I believe problem is Nikon/DT related not DNG. Canon files I tried > > > work > > > as expected. Another example Nikon D1X files converted to DNG are > > > useless because there is no way turn pixel scale module on > > > manually. > > > > simple, don't convert native files to dng. the dng format is not > > provided > > by Nikon and cannot know the proprietary secrets that Nikon uses to > > generate its raw files. dng is *not* a standard. dng makes changes > > the > > the original (raw). why convert your raw twice? > > > > Same files tested in Rawtherapee work as expected. Lens correction is > applied, focus distance is displayed, D1X files are properly scaled. rawtherapee is not dt. ps may also, but I do not know. means nothing. don't convert to dng, dt then works fine. -- (paka)Patrick Shanahan Plainfield, Indiana, USA @ptilopteri http://en.opensuse.orgopenSUSE Community Memberfacebook/ptilopteri Registered Linux User #207535@ http://linuxcounter.net Photos: http://wahoo.no-ip.org/piwigo paka @ IRCnet freenode ___ darktable developer mailing list to unsubscribe send a mail to darktable-dev+unsubscr...@lists.darktable.org
Re: [darktable-dev] DNG vs RAW → Lens and focus info
* Timur Irikovich Davletshin [04-04-18 08:46]: > On Wed, 2018-04-04 at 08:21 -0400, Patrick Shanahan wrote: > > * Timur Irikovich Davletshin [04-04-18 > > 08:01]: > > > On Wed, 2018-04-04 at 13:36 +0200, Tobias Ellinghaus wrote: > > > > Am Mittwoch, 4. April 2018, 13:15:39 CEST schrieb Timur Irikovich > > > > Davletshin: > > > > > Hello everybody! > > > > > > > > > > Just decided to play with DNG converter and discovered problem > > > > > related > > > > > to lens data interpretation by DT (2.4.2). > > > > > > > > > > 1. NEF file loaded by DT applies correct lens parameters. > > > > > Lens info shown by DT: Nikon AF-S DX Nikkor 18-55mm > > > > > f/3.5-5.6G > > > > > VR II > > > > > > > > > > 2. DNG file cannot apply it because wrong EXIF information is > > > > > used > > > > > (short lens name vs. full). > > > > > Lens info shown by DT: 18.0-55.0 mm f/3.5-5.6 > > > > > > > > > > 3. Focus information also is lost in DNG. > > > > > > > > That's why we tell everyone to never convert to DNG. > > > > > > > > Tobias > > > > > > > > [...] > > > > > > I believe problem is Nikon/DT related not DNG. Canon files I tried > > > work > > > as expected. Another example Nikon D1X files converted to DNG are > > > useless because there is no way turn pixel scale module on > > > manually. > > > > simple, don't convert native files to dng. the dng format is not > > provided > > by Nikon and cannot know the proprietary secrets that Nikon uses to > > generate its raw files. dng is *not* a standard. dng makes changes > > the > > the original (raw). why convert your raw twice? > > > > DNG made from Canon, Olympus works, Nikon's doesn't... meanwhile EXIF > data is there. Looks like it's not a problem of DNG itself. > > Whether we like it or not but DNG files (native or converted) are quite > common. Especially when DT documentation declares some sort of DNG > support in very first line of https://www.darktable.org/resources/camer > a-support/ do you not really read what you cite? Cameras that produce DNG files should be supported even if they are not on the list but samples are still appreciated. says nothing about supporting dng which is not native out-of-the-camera. -- (paka)Patrick Shanahan Plainfield, Indiana, USA @ptilopteri http://en.opensuse.orgopenSUSE Community Memberfacebook/ptilopteri Registered Linux User #207535@ http://linuxcounter.net Photos: http://wahoo.no-ip.org/piwigo paka @ IRCnet freenode ___ darktable developer mailing list to unsubscribe send a mail to darktable-dev+unsubscr...@lists.darktable.org
Re: [darktable-dev] DNG vs RAW → Lens and focus info
On Wed, 2018-04-04 at 08:21 -0400, Patrick Shanahan wrote: > * Timur Irikovich Davletshin [04-04-18 > 08:01]: > > On Wed, 2018-04-04 at 13:36 +0200, Tobias Ellinghaus wrote: > > > Am Mittwoch, 4. April 2018, 13:15:39 CEST schrieb Timur Irikovich > > > Davletshin: > > > > Hello everybody! > > > > > > > > Just decided to play with DNG converter and discovered problem > > > > related > > > > to lens data interpretation by DT (2.4.2). > > > > > > > > 1. NEF file loaded by DT applies correct lens parameters. > > > > Lens info shown by DT: Nikon AF-S DX Nikkor 18-55mm > > > > f/3.5-5.6G > > > > VR II > > > > > > > > 2. DNG file cannot apply it because wrong EXIF information is > > > > used > > > > (short lens name vs. full). > > > > Lens info shown by DT: 18.0-55.0 mm f/3.5-5.6 > > > > > > > > 3. Focus information also is lost in DNG. > > > > > > That's why we tell everyone to never convert to DNG. > > > > > > Tobias > > > > > > [...] > > > > I believe problem is Nikon/DT related not DNG. Canon files I tried > > work > > as expected. Another example Nikon D1X files converted to DNG are > > useless because there is no way turn pixel scale module on > > manually. > > simple, don't convert native files to dng. the dng format is not > provided > by Nikon and cannot know the proprietary secrets that Nikon uses to > generate its raw files. dng is *not* a standard. dng makes changes > the > the original (raw). why convert your raw twice? > Same files tested in Rawtherapee work as expected. Lens correction is applied, focus distance is displayed, D1X files are properly scaled. ___ darktable developer mailing list to unsubscribe send a mail to darktable-dev+unsubscr...@lists.darktable.org
Re: [darktable-dev] DNG vs RAW → Lens and focus info
On Wed, 2018-04-04 at 08:21 -0400, Patrick Shanahan wrote: > * Timur Irikovich Davletshin [04-04-18 > 08:01]: > > On Wed, 2018-04-04 at 13:36 +0200, Tobias Ellinghaus wrote: > > > Am Mittwoch, 4. April 2018, 13:15:39 CEST schrieb Timur Irikovich > > > Davletshin: > > > > Hello everybody! > > > > > > > > Just decided to play with DNG converter and discovered problem > > > > related > > > > to lens data interpretation by DT (2.4.2). > > > > > > > > 1. NEF file loaded by DT applies correct lens parameters. > > > > Lens info shown by DT: Nikon AF-S DX Nikkor 18-55mm > > > > f/3.5-5.6G > > > > VR II > > > > > > > > 2. DNG file cannot apply it because wrong EXIF information is > > > > used > > > > (short lens name vs. full). > > > > Lens info shown by DT: 18.0-55.0 mm f/3.5-5.6 > > > > > > > > 3. Focus information also is lost in DNG. > > > > > > That's why we tell everyone to never convert to DNG. > > > > > > Tobias > > > > > > [...] > > > > I believe problem is Nikon/DT related not DNG. Canon files I tried > > work > > as expected. Another example Nikon D1X files converted to DNG are > > useless because there is no way turn pixel scale module on > > manually. > > simple, don't convert native files to dng. the dng format is not > provided > by Nikon and cannot know the proprietary secrets that Nikon uses to > generate its raw files. dng is *not* a standard. dng makes changes > the > the original (raw). why convert your raw twice? > DNG made from Canon, Olympus works, Nikon's doesn't... meanwhile EXIF data is there. Looks like it's not a problem of DNG itself. Whether we like it or not but DNG files (native or converted) are quite common. Especially when DT documentation declares some sort of DNG support in very first line of https://www.darktable.org/resources/camer a-support/ ___ darktable developer mailing list to unsubscribe send a mail to darktable-dev+unsubscr...@lists.darktable.org
Re: [darktable-dev] DNG vs RAW → Lens and focus info
* Timur Irikovich Davletshin [04-04-18 08:01]: > On Wed, 2018-04-04 at 13:36 +0200, Tobias Ellinghaus wrote: > > Am Mittwoch, 4. April 2018, 13:15:39 CEST schrieb Timur Irikovich > > Davletshin: > > > Hello everybody! > > > > > > Just decided to play with DNG converter and discovered problem > > > related > > > to lens data interpretation by DT (2.4.2). > > > > > > 1. NEF file loaded by DT applies correct lens parameters. > > > Lens info shown by DT: Nikon AF-S DX Nikkor 18-55mm f/3.5-5.6G > > > VR II > > > > > > 2. DNG file cannot apply it because wrong EXIF information is used > > > (short lens name vs. full). > > > Lens info shown by DT: 18.0-55.0 mm f/3.5-5.6 > > > > > > 3. Focus information also is lost in DNG. > > > > That's why we tell everyone to never convert to DNG. > > > > Tobias > > > > [...] > > I believe problem is Nikon/DT related not DNG. Canon files I tried work > as expected. Another example Nikon D1X files converted to DNG are > useless because there is no way turn pixel scale module on manually. simple, don't convert native files to dng. the dng format is not provided by Nikon and cannot know the proprietary secrets that Nikon uses to generate its raw files. dng is *not* a standard. dng makes changes the the original (raw). why convert your raw twice? -- (paka)Patrick Shanahan Plainfield, Indiana, USA @ptilopteri http://en.opensuse.orgopenSUSE Community Memberfacebook/ptilopteri Registered Linux User #207535@ http://linuxcounter.net Photos: http://wahoo.no-ip.org/piwigo paka @ IRCnet freenode ___ darktable developer mailing list to unsubscribe send a mail to darktable-dev+unsubscr...@lists.darktable.org
Re: [darktable-dev] DNG vs RAW → Lens and focus info
On Wed, 2018-04-04 at 13:36 +0200, Tobias Ellinghaus wrote: > Am Mittwoch, 4. April 2018, 13:15:39 CEST schrieb Timur Irikovich > Davletshin: > > Hello everybody! > > > > Just decided to play with DNG converter and discovered problem > > related > > to lens data interpretation by DT (2.4.2). > > > > 1. NEF file loaded by DT applies correct lens parameters. > > Lens info shown by DT: Nikon AF-S DX Nikkor 18-55mm f/3.5-5.6G > > VR II > > > > 2. DNG file cannot apply it because wrong EXIF information is used > > (short lens name vs. full). > > Lens info shown by DT: 18.0-55.0 mm f/3.5-5.6 > > > > 3. Focus information also is lost in DNG. > > That's why we tell everyone to never convert to DNG. > > Tobias > > [...] I believe problem is Nikon/DT related not DNG. Canon files I tried work as expected. Another example Nikon D1X files converted to DNG are useless because there is no way turn pixel scale module on manually. ___ darktable developer mailing list to unsubscribe send a mail to darktable-dev+unsubscr...@lists.darktable.org
Re: [darktable-dev] DNG vs RAW → Lens and focus info
Am Mittwoch, 4. April 2018, 13:15:39 CEST schrieb Timur Irikovich Davletshin: > Hello everybody! > > Just decided to play with DNG converter and discovered problem related > to lens data interpretation by DT (2.4.2). > > 1. NEF file loaded by DT applies correct lens parameters. > Lens info shown by DT: Nikon AF-S DX Nikkor 18-55mm f/3.5-5.6G > VR II > > 2. DNG file cannot apply it because wrong EXIF information is used > (short lens name vs. full). > Lens info shown by DT: 18.0-55.0 mm f/3.5-5.6 > > 3. Focus information also is lost in DNG. That's why we tell everyone to never convert to DNG. Tobias [...] signature.asc Description: This is a digitally signed message part.
