Linda From Maine wrote:
Thanks so much, Robert. It appears to be a plug-in for Lightroom, which I don't have, though I'm foreseeing the future more clearly
I should have mentioned in opening that I was hoping there might be a stand-alone software. Appreciate your time!
There is but not that user friendly, exiftool.
Exif values and tags are often created by the manufacturer so the name canon uses for something may be different to nikon and pentax and ...
This is sample output from exiftool looking specifically at the focus point used for photo's from a Pentax K5
exiftool -s -AFPointSelected .
the command is exiftool
-s basically selects how to format the output
AFPointSelected is the tag for which Auto focus points were used
. this actually means do this for all the files in the current directory.
(exiftool -s -AFPointSelected _IGP6894.DNG would just read the exif information from the file called _IGP6894.DNG)
These are the results for the 16 files in this folder
----------------------------------------------------------
======== ./_IGP6894.DNG
AFPointSelected : Fixed Center
======== ./_IGP6895.DNG
AFPointSelected : Fixed Center
======== ./_IGP6896.DNG
AFPointSelected : Fixed Center
======== ./_IGP6897.DNG
AFPointSelected : Fixed Center
======== ./_IGP6898.DNG
AFPointSelected : Fixed Center
======== ./_IGP6899.DNG
AFPointSelected : Fixed Center
======== ./_IGP6900.DNG
AFPointSelected : Fixed Center
======== ./_IGP6901.DNG
AFPointSelected : Fixed Center
======== ./_IGP6894_DxO.dng
AFPointSelected : Fixed Center
======== ./_IGP6895_DxO.dng
AFPointSelected : Fixed Center
======== ./_IGP6896_DxO.dng
AFPointSelected : Fixed Center
======== ./_IGP6897_DxO.dng
AFPointSelected : Fixed Center
======== ./_IGP6898_DxO.dng
AFPointSelected : Fixed Center
======== ./_IGP6899_DxO.dng
AFPointSelected : Fixed Center
======== ./_IGP6900_DxO.dng
AFPointSelected : Fixed Center
======== ./_IGP6901_DxO.dng
AFPointSelected : Fixed Center
1 directories scanned
16 image files read
-----------------------------------------------
In this case i was using a manual lens and only had the centre focus point active. But generally it returns one focus point sometimes more and sometimes 'none' in the case of specifying 'none' the camera didn't think anything was in focus and was probably right.
I know the fixed Center focus point is exactly in the middle of the frame so thats would be sharpest in each of these 16 frames.
If you know where your AF points are this is enough. For my camera there are 11 AF points 1 centre 4 at each of the rule of thirds grid intersections 4 half way down the sides of the centre rule of thirds square two more are level with the centre focal spot located half way either side on the left and right central rule of thirds grid.
That makes it easy for me, with more focus points it's a bit tricky.
There is an old windows program which uses exiftool
https://www.photome.de/ this may work for you it can run under windows 10 and i've used that with parallels.
Photome can show a thumbnail of your photo with the active focus points. It works with DNG files it might not work for you it is free thou.