![]() ![]() Both products likely have controls over color space (on LR they are in the transfer process, either in the plugin setup or under Preferences, External Editing. Color space is not directly related to raw conversion, and color space if properly handled has no significant effect on what you see - but if color space gets mixed up between products you can get anywhere from subtle to dramatic changes in appearance usually bad ones. Note, just to keep this even more confusing, going from one editor to another and back can also have issues with color space. It is important as you use two different editors to keep track of which one is applying change (and what type of change), so you do not accidentally have both altering your image. It is possible that LR is importing them differently on return and applying some preset or edit to the result. ![]() If they look different afterwards, then the two are going through some different type of either editing or conversion either before leaving Photolab, or in returning to LR. At that point the DNG and the TIFF are just containers to hold the data, neither is raw. Returning an edited photo should be the same regardless of whether it is returned as a DNG or TIFF (and mostly the same as a JPG). If you mean you are calling Photolab from within Lightroom, and have a choice how Photolab returns the result, and that return makes a difference, it is odd if that is true. Hope it helped more than hurt.Ĭlick to expand.I'm not sure what "returned DNG" vs "returned TIFF" means here. That preserves your option to essentially un-do the DNG conversion, but only if you selected that up front. In that case, the raw image as originally taken by the camera, un-converted, is inside the DNG. Just to confuse things a bit further, there's another aspect: During the raw -> DNG conversion you have the option of preserving the raw data. You need to check how that works (often you have a choice). In that case, the editing done in lightroom may affect what Photolab sees. To complicate this, the way that some plugin editors exchange data with Lightroom varies, some will pass the original raw image, but some will pass a TIFF file invisibly and internally. PROVIDED (and this is important) that PhotoLab is taking the DNG. So provided PhotoLab can read the DNG's, you can do what you have suggested without worrying that LR has changed them. Now if you edited the DNG in Lightroom and exported a TIFF instead, and replaced your DNG with the TIFF - then yes, absolutely, that's an edited photo and a lot of changes have been "baked in". (Note I use this as an example but do not know if it is true, I've simply heard it). NOT because it has been edited (in the sense the image has changed) but because the structure of the DNG file is not understood properly by that program. Now if you took that DNG and tried to go to (rumor has it) DxO's editor, it might not work. So long as it can fully process the DNG then the fact you imported it to Lightroom, or even converted to DNG, is moot. ![]() This is a non-destructive process at this point however - if you take the same DNG and go to (say) CaptureOne, then it will ignore the preview, and start with the same raw data (not yet edited) and do it's proprietary conversion to color, which may result in a slightly different look than LR. This must happen to view the image, every raw editor will do it, they all do it differently. It is fair to call this editing, even if automatic. That process converts the raw data to a typical color image it is sometimes called a de-mosaic process. Now as it comes into Lightroom, the image produces a preview. For lightroom the theory appears true, but if you later tried using a different editor you might not get the same results, but (I believe) because of the meta data, not because of the image data. In theory that does not change the actual image data. During the DNG conversion that data is changed, and some may be lost. First caveat: a digital image is more than the actual counted photons that produce it, it is also a ton of metadata that describes how it was taken, including information about that capture's structure. When you imported a CR2 into lightroom and, during the import converted to DNG, that is primarily just a change in file structure, and not a change in the raw data. There are subtle aspects to your question I'm going to try to be careful about, terminology is a bit tough here. ![]()
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