Nikon D780: AFPointsUsed issue

[don_cristobal]

System type: MacOS 12.5.1, exiftool version: 12.49

Is this an error? For Nikon D780, AFPointsUsed seems to be incorrect in exiftool, or at least differ from the official Nikon software (NX Studio).

Sample image available from: https://img.photographyblog.com/reviews/nikon_d780/sample_images/nikon_d780_05.jpg

Nikon NX Studio shows one focus point. But exiftool shows three focus points in AFPointsUsed.
> exiftool -AFPointsUsed nikon_d780_05.jpg
AF Points Used                  : C6,D11,E5
Nikon NX Studio could theoretically be incorrect. But this seems unlikely because the points make sense. (checked with several images)


(image attached to this message is a screenshot from NX Studio - only for illustration and does not contain relevant EXIF data - download sample image mentioned above to reproduce problem)

[Phil Harvey]

Thanks for pointing this out and for the sample.

ExifTool hasn't been keeping up with the AF points of newer Nikon models.  I'll add support for this mode of the D780 (the 51-point AF) in the next release.  I also have a sample which uses the 81-point AF, so I can add support for this as well.  I will need samples of the all AF-area modes (both with and without live view) to be able to be sure they are all decoded properly.  If you have a D780 available, maybe you could take these samples?:

viewfinder single-point AF
viewfinder dynamic-area 9-point
viewfinder dynamic-area 21-point
viewfinder dynamic-area 51-point
viewfinder 3D-tracking
viewfinder group-area AF
viewfinder auto-area AF
live-view pinpoint AF
live-view single-point AF
live-view wide-area AF (S)
live-view wide-area AF (L)
live-view dynamic-area AF
live-view auto-area AF

- Phil

[don_cristobal]

Hi Phil, thanks for looking into this. I unfortunately do not have a D780. The following pages have straight-out-of-camera JPEGs or NEFs with the relevant AF data, but they will of course only cover a small part of use cases.
https://www.photographyblog.com/reviews/nikon_d780_review#sample_images
https://www.imaging-resource.com/PRODS/nikon-d780/nikon-d780GALLERY.HTM (only those photos not named "-MOD")
https://www.ephotozine.com/article/nikon-d780-sample-photos-34425 (have to click on ,,High-Res")

[Phil Harvey]

OK, thanks.  I'll do what I can for the D780.

- Phil

[don_cristobal]

OK, thanks.  I'll do what I can for the D780.

- Phil

Looks good now, thank you very much!