I downloaded the image he provided (https://www.dpreview.com/sample-galleries/4949897610/pentax-...)

The DNG file did have the 01 byte at `2FD00` (from xxd or hexdump -C). However it didn't have a byte position `3E40B`. I tried searching and there is literally no entry at that position. I found a 02 value at 3e40 but not at 3e40b. Is this a typo?

Where did you find it to try and repro?

You need to click the link that says "RAW (33.0MB)". The filename should be "IMGP0847.DNG".

Thanks immensely. Very important detail,

Did you find a 02 at 3E40B? I found 01 at 2FD00, but there was no 3E40B byte position entry.

I did find something similar at 00003e40: 00003e40 02 00 04 00 0a 00 00 00 30 01 00 00 00 00 00 00 |........0.......|

Yes:

  dd status=none if=IMGP0847.DNG bs=1 skip=0x3e40b count=1 | xxd
  00000000: 02

Thanks! You are correct, when I did a dump with `xxd IMGP0847.DNG > output.hex` it wasn't showing up for some reason.... But your command worked (though my dd doesn't like hex values so I needed to get decimal via printf "%d\n" 0x3E40B).

Curious if you (clearly smarter than me) know why it didn't show correctly in the xxd or hexdump for the file. Would love to learn.

  xxd IMGP0847.DNG | grep 03e400:
  0003e400: ffd8 ffc3 000e 0e10 800c 5002 0011 0001  ..........P.....

Look at the byte at offset 11 (0xb), it's there.

Ohhh the b offset (11) is an offset _on that line_ (0003e400)! I got it now:D This thread taught me a great deal. Thank you, MajesticHobo2!

Maybe you need to iMessage it to someone else? Just guessing.