Lightroom. Correcting the Thumbnail

[Stealth3kpl]

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I think this is a problem associated with the M240/SD card rather than Lightroom. 

The last time I used my M240 was 3 or 4 years ago in Nepal. Towards the end of that month long trip I noticed a couple of thumbnails were getting mixed up in the camera. I was flicking through the images on the back of the camera and noticed that a thumbnail from, say, image 1000 had been brought over to, say,  image 1007. I don't recall what issues that brought in Lightroom later.

Fast forward to a couple of days ago. I took a picture whilst walking through the park with my Summitar. I processed a copy to B+W in Lightroom. This morning when I opened up Lightroom, I have the B+W image still, but Lightroom is reading a rogue thumbnail file in the DNG displaying an image taken 4 years ago! If I export that DNG file, the correct image is in the file. What can I do about this in Lightroom to get the correct image back inorder to process it? If I now create a copy, I just get another image of a goat!

Pete

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[Stealth3kpl]

The card has been reformatted in camera many times over the last 4 years.

Pete

[Exodies]

To get the correct thumbnail just click on the image to zoom in, then again to zoom out. The bug is in the camera’s unique ID for the files. It’s not unique.

[zeitz]

"If I export that DNG file, the correct image is in the file."

I guess this is becoming a crusade for me.  There is no image in a .dng file or any other raw file.  .dng contains three groups of information - the values read from the sensor's pixels (raw data); metadata related to the camera, lens, time, date, etc; and post-processing steps from programs like Lightroom that can be stored inside the .dng file.  There is no .jpg, .tif, .bmp or any other format image in the file.  Storing post-processing steps inside the .dng raw file is unique to .dng as far as I can tell.  Other camera manufacturer raw file formats do not store post-processing data inside their raw files, instead always using .xmp sidecar files.

In Lightroom for .dng raw files you have the option of storing the post-processing steps either inside the .dng file or in a separate .xmp sidecar file.  You may want to check how your preferences are set in Lightroom.

[Stealth3kpl]

2 hours ago, Exodies said:

To get the correct thumbnail just click on the image to zoom in, then again to zoom out. The bug is in the camera’s unique ID for the files. It’s not unique.

Ah, that got the correct image back, thanks. It sometimes reverts to the goat so I'll see if I can get anywhere with Zeitz idea.

Thanks both.

Pete

[Stealth3kpl]

Maybe updating my M240 firmware will prevent it happening again?

Pete

[Stealth3kpl]

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1 hour ago, zeitz said:

"If I export that DNG file, the correct image is in the file."

I guess this is becoming a crusade for me.  There is no image in a .dng file or any other raw file.  .dng contains three groups of information - the values read from the sensor's pixels (raw data); metadata related to the camera, lens, time, date, etc; and post-processing steps from programs like Lightroom that can be stored inside the .dng file.  There is no .jpg, .tif, .bmp or any other format image in the file.  Storing post-processing steps inside the .dng raw file is unique to .dng as far as I can tell.  Other camera manufacturer raw file formats do not store post-processing data inside their raw files, instead always using .xmp sidecar files.

In Lightroom for .dng raw files you have the option of storing the post-processing steps either inside the .dng file or in a separate .xmp sidecar file.  You may want to check how your preferences are set in Lightroom.

Why is Lightroom substituting an image that has not been on the card for 4 years?

Pete

[Stealth3kpl]

Ah, I think I've sorted it for good. I right clicked and under "Metadata" I selected "Update DNG preview and metadata".

Pete

[Exodies]

6 hours ago, Stealth3kpl said:

Maybe updating my M240 firmware will prevent it happening again?

Pete

No, it hasn’t been fixed.

[Exodies]

7 hours ago, zeitz said:

"If I export that DNG file, the correct image is in the file."

I guess this is becoming a crusade for me.  There is no image in a .dng file or any other raw file.  .dng contains three groups of information - the values read from the sensor's pixels (raw data); metadata related to the camera, lens, time, date, etc; and post-processing steps from programs like Lightroom that can be stored inside the .dng file.  There is no .jpg, .tif, .bmp or any other format image in the file.  Storing post-processing steps inside the .dng raw file is unique to .dng as far as I can tell.  Other camera manufacturer raw file formats do not store post-processing data inside their raw files, instead always using .xmp sidecar files.

In Lightroom for .dng raw files you have the option of storing the post-processing steps either inside the .dng file or in a separate .xmp sidecar file.  You may want to check how your preferences are set in Lightroom.

There is no image in any computer file, just instructions for a program to create an image on your screen. 

[jaapv]

6 hours ago, Stealth3kpl said:

Why is Lightroom substituting an image that has not been on the card for 4 years?

Pete

It found a duplicate file name somewhere. It could even be on the SD card. Unless you do a forensic-level reformat, no data are erased, they are only disabled and can be overwritten. If you use an SD rescue program it is not unusual to find ancient files on the card, despite multiple formats.

[Exodies]

Lightroom has fished the old preview from its catalogue not from the card.