Overland Posted June 26, 2022 Share #1 Posted June 26, 2022 Advertisement (gone after registration) Hi I noticed that in Lightroom Classic 11.4 the integrated lens correction can be activated for DNG files, but it has no effect. With JPEG files, the integrated lens correction works normally. Bug? Error on my part? Link to post Share on other sites More sharing options...
Advertisement Posted June 26, 2022 Posted June 26, 2022 Hi Overland, Take a look here Q2M: Lens corrections in LRC?. I'm sure you'll find what you were looking for!
robsonj Posted June 26, 2022 Share #2 Posted June 26, 2022 Corrections are already applied in camera, likely also applied to jpeg, but the jpeg probably doesn’t contain that metadata, thus for jpeg you may be double correcting Link to post Share on other sites More sharing options...
Overland Posted June 26, 2022 Author Share #3 Posted June 26, 2022 Double correction? That's interesting. I have never heard of that before. Thanks! Link to post Share on other sites More sharing options...
robsonj Posted June 26, 2022 Share #4 Posted June 26, 2022 14 minutes ago, Overland said: Double correction? That's interesting. I have never heard of that before. Thanks! I may be incorrect, but I am thinking the correction is baked into the jpeg in camera, then you import it to Lightroom, and tell Lightroom to correct it again, Lightroom’s says, sure thing boss and again applies a lens correction to the jpg, versus the dng where Lightroom says, sorry I see in the metadata of the dng that it’s already been applied. I bet if you convert the dng to a jpg, then re-import that jpg, I bet you can apply the lens correction again Link to post Share on other sites More sharing options...
clasami Posted June 26, 2022 Share #5 Posted June 26, 2022 vor 54 Minuten schrieb Overland: Hi I noticed that in Lightroom Classic 11.4 the integrated lens correction can be activated for DNG files, but it has no effect. With JPEG files, the integrated lens correction works normally. Bug? Error on my part? If you look at the very bottom of the lens correction tab, it says "Internal lens profile already applied". If you click on the "i" for info, it tells you that distortion correction was applied to the file (but not vignetting correction). That's for DNG. The OOC JPEG has already lens correction applied. Any additional lens correction will lead to problems. Link to post Share on other sites More sharing options...
Overland Posted June 26, 2022 Author Share #6 Posted June 26, 2022 In theory, I understand that the built-in lens correction is applied to DNG files. But why do JPEG files shot at the same time appear more and better corrected? This made me wonder if the lens correction is applied to DNG files at all. Link to post Share on other sites More sharing options...
SrMi Posted June 26, 2022 Share #7 Posted June 26, 2022 Advertisement (gone after registration) 1 hour ago, Overland said: In theory, I understand that the built-in lens correction is applied to DNG files. But why do JPEG files shot at the same time appear more and better corrected? This made me wonder if the lens correction is applied to DNG files at all. Without lens correction Q2 files are almost useless. You will instantly notice if the lens correction is not applied. Link to post Share on other sites More sharing options...
SrMi Posted June 26, 2022 Share #8 Posted June 26, 2022 7 hours ago, Overland said: In theory, I understand that the built-in lens correction is applied to DNG files. But why do JPEG files shot at the same time appear more and better corrected? This made me wonder if the lens correction is applied to DNG files at all. I do not see any difference with Q2M JPGs. Selecting "Enable Profile Correction" reports "Lens Profile:None" and "Unable to locate a matching profile automatically" (Lightroom Classic v11.4). What kind of lens profile have you selected to see the change in the JPG? Link to post Share on other sites More sharing options...
Overland Posted June 28, 2022 Author Share #9 Posted June 28, 2022 On 6/27/2022 at 1:58 AM, SrMi said: I do not see any difference with Q2M JPGs. Selecting "Enable Profile Correction" reports "Lens Profile:None" and "Unable to locate a matching profile automatically" (Lightroom Classic v11.4). What kind of lens profile have you selected to see the change in the JPG? There is no profile that can be selected. The integrated profile is used for both DNF and JPEG files. Nevertheless, when I shoot DNG and JPEG parallel with my Q2M and compare the two images in LRC, the difference in correction is significant: the JPEG image looks stronger and perhaps better corrected than the simultaneously shot DNG image. And this is exactly what irritates me. Link to post Share on other sites More sharing options...
SrMi Posted June 28, 2022 Share #10 Posted June 28, 2022 32 minutes ago, Overland said: There is no profile that can be selected. The integrated profile is used for both DNF and JPEG files. Nevertheless, when I shoot DNG and JPEG parallel with my Q2M and compare the two images in LRC, the difference in correction is significant: the JPEG image looks stronger and perhaps better corrected than the simultaneously shot DNG image. And this is exactly what irritates me. There is no integrated profile for JPGs, all modifications have been applied when creating the JPG of n the camera. The DNG contains a built-in profile that is applied/interpreted by LrC. Yes, there is a slight difference, did not notice it before. I do not know where that difference comes from. 1 Link to post Share on other sites More sharing options...
clasami Posted June 28, 2022 Share #11 Posted June 28, 2022 vor 2 Stunden schrieb SrMi: There is no integrated profile for JPGs, all modifications have been applied when creating the JPG of n the camera. The DNG contains a built-in profile that is applied/interpreted by LrC. Yes, there is a slight difference, did not notice it before. I do not know where that difference comes from. I'd say it is how LR implements the numbers provided in the DNG. Certainly not 1:1 compared to in-camera. Link to post Share on other sites More sharing options...
Overland Posted June 28, 2022 Author Share #12 Posted June 28, 2022 Just noticed: When I select the profile of the Leica M with the 28 mm SUMMILUX-M f/1.4 ASPH, the correction of the DNG file seems better than with the integrated profile of the Q2M. I will continue to observe this. 1 Link to post Share on other sites More sharing options...
SAronian Posted July 1, 2022 Share #13 Posted July 1, 2022 The distortion correction applied is different for both JPEG and DNG. It also appears that none of the RAW processing apps have a profile specific to the 28mm SUMMILUX f1.7 28 ASPH. Neither Adobe or others list this lens as being supported. The JPEG is corrected in camera with an embedded tag "SUMMILUX 1:1.7/28 ASPH." The DNG is tagged "Lens SUMMILUX 1:1.7/28 ASPH." but with a profile tagged "LensProfile Leica SUMMICRON-M 28 mm f/2 ASPH." I'm assuming the JPEG is correctly processed and what we need for correct DNG processing is a lens profile for the 28mm SUMMILUX f1.7 28 ASPH. Leica could supply the profile used for in-camera distortion correction, either to users or RAW processing software developers. 1 Link to post Share on other sites More sharing options...
SrMi Posted July 1, 2022 Share #14 Posted July 1, 2022 21 minutes ago, SAronian said: The distortion correction applied is different for both JPEG and DNG. It also appears that none of the RAW processing apps have a profile specific to the 28mm SUMMILUX f1.7 28 ASPH. Neither Adobe or others list this lens as being supported. The JPEG is corrected in camera with an embedded tag "SUMMILUX 1:1.7/28 ASPH." The DNG is tagged "Lens SUMMILUX 1:1.7/28 ASPH." but with a profile tagged "LensProfile Leica SUMMICRON-M 28 mm f/2 ASPH." I'm assuming the JPEG is correctly processed and what we need for correct DNG processing is a lens profile for the 28mm SUMMILUX f1.7 28 ASPH. Leica could supply the profile used for in-camera distortion correction, either to users or RAW processing software developers. Leica already includes a built-in profile in Q2’s DNG files. It is used by post processing software to apply correction. Adobe software cannot replace built-in profile with a custom profile. It may be that DxO software has their own Q2 profile that they use instead. Link to post Share on other sites More sharing options...
SAronian Posted July 1, 2022 Share #15 Posted July 1, 2022 Understood that "Leica already includes a built-in profile in Q2”s DNG files" but the built-in profile is for the Leica SUMMICRON-M 28 mm f/2 ASPH. Link to post Share on other sites More sharing options...
SrMi Posted July 1, 2022 Share #16 Posted July 1, 2022 (edited) 9 minutes ago, SAronian said: Understood that "Leica already includes a built-in profile in Q2”s DNG files" but the built-in profile is for the Leica SUMMICRON-M 28 mm f/2 ASPH. That is impossible if you look at uncorrected DNGs. How did you come to that conclusion? Edited July 1, 2022 by SrMi Link to post Share on other sites More sharing options...
SAronian Posted July 1, 2022 Share #17 Posted July 1, 2022 I am incorrect. Both JPEG and DNG files from Q2 use the lens descriptor "SUMMILUX 1:1.7/28 ASPH." "" It's the software, Lightroom, Capture One, DxO PureRAW that link to "Leica SUMMICRON-M 28 mm f2 ASPH." This is still a problem which should be solved. Link to post Share on other sites More sharing options...
SrMi Posted July 2, 2022 Share #18 Posted July 2, 2022 6 hours ago, SAronian said: I am incorrect. Both JPEG and DNG files from Q2 use the lens descriptor "SUMMILUX 1:1.7/28 ASPH." "" It's the software, Lightroom, Capture One, DxO PureRAW that link to "Leica SUMMICRON-M 28 mm f2 ASPH." This is still a problem which should be solved. What do you mean by "link to"? With Adobe, the built-in profile is applied. If you select Enable Profile Correction then the "Make" field shows "Built-in". If you change that to anything else, then you overlay another profile, which can produce unintended results. DxO loads Q2 + Q2 Lens module. Link to post Share on other sites More sharing options...
Bokeh1 Posted February 18, 2023 Share #19 Posted February 18, 2023 Apologies, just digging this up again: I used Topaz Photo AI to edit a RAW file from my Q2 and it did a great job de-noising the image. However, the new DNG that is saved back into Lightroom Classic does not have the lens corrections that were applied to the original file automatically. As written above, it says "Built in Lens Profile applied" under Lens Corrections in Lightroom but when I click on it it does not let me see what corrections were actually applied. Is there a way to simply copy these settings over to the modified DNG after it is saved from Topaz? Many thanks! Link to post Share on other sites More sharing options...
jaapv Posted February 22, 2023 Share #20 Posted February 22, 2023 Better ask Topaz. In my experience the saving back part of the software needs some refining in general. Link to post Share on other sites More sharing options...
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