Nikon enables the use of RAW files of different sizes in the D850. According to the specifications in the manual, the formats are defined as follows:
L 8256 × 5504
M 6192 × 4128
S 4128 × 2752
(these figures are also shown in the camera menu)

darktable tells me:
L 8288 x 5520
M 7104 x 4728
S 6216 x 4136

While the deviations for size L are still small (we had a discussion about them in the past), they are very significant for M and L - according to Nikon a file of size S 11.3MP, while darktable assumes over 25MP.
Geeqie again shows the Nikon numbers.
Exiftool shows the darktable numbers.

A jpg or tiff file exported from darktable shows the darktable numbers in xnview.

What is going on here?

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regards
Bernhard

https://www.bilddateien.de

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