original file
https://1drv.ms/f/s!AjxMVkG84JkZgfJ5n8tP-fdEbtd-oQ?e=HwbQsn

My tests have revealed that whether running Stash on Docker, or directly on Linux, macOS, or Windows, the thumbnail aspect ratios are incorrect in the photo wall mode when adding photos taken with Nikon DSLR cameras. There is no such issue with photos from other brands like Canon or Sony (though the testing might not have been exhaustive).

I would greatly appreciate it if the developers could address and resolve this bug.

The proportion seems to be correct, but with the wrong width and height ascribed by the backend.
With the ID 5868 mapped to one of the sample images, the following query:

query {
  findImage(id: 5868) {
    ... on Image {
      id
      visual_files {
        ... on ImageFile {
          path
          height
        	width
        }
      }
    }
  }
}

returns the following value:

{
  "data": {
    "findImage": {
      "id": "5868",
      "visual_files": [
        {
          "path": "D:\\Backups\\DSC_0052.jpg",
          "height": 5504,
          "width": 8256
        }
      ]
    }
  }
}

I suspect this has to do with the non-zero orientation in the EXIF metadata:

Exif Image Width                : 8256
Exif Image Height               : 5504
...
Orientation                     : Rotate 270 CW

This seems to happen for other kinds of images, as well. In particular, I'm noticing a lot of animated webps reporting (via the same graphql query) a height and width of 0, leading to react-photo-gallery using their native width, and filling the row's height -- making for some very awkward-ly stretched images.

possibly duplicated in #4738