.tif
generic-tiff
OpenSlide will detect a file as generic TIFF if:
The first image in the TIFF file is the full-resolution image. Any other tiled images in the file with the “reduced resolution” bit set are assumed to be reduced-resolution versions of the original.
None.
Many TIFF tags are encoded as properties starting with “tiff.
”.
https://openslide.cs.cmu.edu/download/openslide-testdata/Generic-TIFF/