In Library, do these steps:
1. In the Catalog pane, select All Photographs.
2. Do Photo > Stacking > Expand All Stacks.
3. Make sure Library > Enable Filters is checked.
4. In the Library Filter bar, click Metadata.
5. Add the Date column and remove the other columns;
6. In the Date column, scroll to the end and click Unknown:
I hugely appreciate the fast suggestion! But unfortunately it did not solve my issue.
The option to chose date - "unknown" is not available, as you see below. Apparently Lightroom does not think that these images are without date. And in a way it makes sense, because lightroom seems to have a meaning about the date and time of these images, that it suggests when I go into "edit capture time..." with one of these images selected. But as you can see in the image bellow, the chosen image has no capture date and time information in the metadata panel to the right.
I really appreciate any other suggestions.
LR gets very confused when imported photos are missing the industry-standard capture date field EXIF:DateTimeOriginal (typically scans and photos that have been mangled by other applications). It behaves very inconsistently. My test catalog shows Unknown in the Date column for imported scans missing DateTimeOriginal, but that's the nature of bugs -- the program behaves unpredictably.
Please add your me-too vote, details of your issue, and your opinion to this longstanding bug report in the official Adobe feedback forum: Lightroom: Still inconsistent capture date/time for photos and videos | Photoshop Family Customer Community
You can find photos that are missing EXIF:DateTimeOriginal by using the Any Filter plugin with this filter:
These are exactly the photos for which LR is getting confused. Note that LR will always display some date (typically the file date modified) under thumbnails and sometimes display a Capture Date in the Metadata > Default panel (which will usually differ from the date shown under the thumbnail). You can manually check for the presence of EXIF:DateTimeOriginal by looking in the Metadata > EXIF panel, e.g.
Once you've identified the photos missing EXIF:DateTimeOriginal, you've already discovered the workaround: Invoke Metadata > Edit Capture Time, and LR will (usually) default the time to the file's date modified, which is often (but not always) correct. You also have the option of setting the Capture Date to the file's date created (which is often correct, but Windows programs rarely preserve the file date created, and more and more Mac programs fail to as well).
Regardless, setting the photo's capture date using Edit Capture Time resolves LR's buggy inconsistency and you shouldn't experience any more problems with that photo.
Thanks a lot for the fast and thorough answers!! Sure hope Adobe fixes this.
Thanks also for the procedure to find these photos with anyfilter. It seems to find them all, but it does also find some photos that I have given Date/Time, or has it from before. Does that make sense to you? Is it because they do not have "original" but might have "digitized" date/time?
Thanks again for providing your knowledge!
It seems to find them all, but it does also find some photos that I have given Date/Time, or has it from before.
By "given Date/Time", do you mean by using the Metadata > Edit Capture Time command, or something else?
I have only used the Metadata > Edit Capture Time command to give Date/Time. I have not used any other tools for this.
I can not be completely sure that I used that command on all the photos that the filter finds, and I can not be sure that it does not leave out some of the photos that I did use the command on, as I have no collection of these.
Was that clear?
For photos that Any Filter finds that you're suspicious about, do this: Look in the Metadata panel with the EXIF tagset. The Date Time Original field should be missing for all of those photos. If you find a photo that has Date Time Original shown in the Metadata > EXIF panel that Any Filter thinks is "unknown", let me know. The Edit Capture Time command should always add the Date Time Original field.
When I use the AnyFilter search that you specified that should only find photos with date/time original is "unknown", it does filter out the photo below, and I believe you can see that this photo indeed has EXIF date/time attached. I think I added date/time manually through the Metadata > Edit Capture Time command to this photo, but I can be mistaken meaning that the photo had Date/time from before.
Let me know if you have more questions!
Just to clarify: Does that photo show up in the Any Filter search results? (I'm not sure what you meant by "filter out".) Since the photo doesn't have a Date Time Original field, the Any Filter search should include it.
Note that the EXIF Date Time field has nothing to do with capture time -- it is defined by the standard as the date/time that the photo was last modified. It is the EXIF Date Time Original field that stores capture time. (The photo above has Date Time but no Date Time Original.) For photos coming from digital camears, Date Time is usually the same or nearly the same as Date Time Original. LR doesn't update Date Time as required by the standard, though it does display it.
This has understandably caused endless confusion. Don't know what the standards committee was thinking in choosing such poor names...