XnView Software

In EXIF displays, panes etc. for ISO values bigger than 65535 (2 bytes) the ISO value tops at 65535. The ExifTool displays them correctly.

There are an increasing number of cameras which offer this feature - in fact all professional cameras nowadays from

- Canon: 1DX, 5D Mk 3 and especially the new 1DX Mk 2 which goes till 400 KiloISO (kISO). Besides that Canon has a model which works at 4.5 MegaISO (!): http://petapixel.com/2015/09/13/this-is ... ew-camera/
- Nikon: the new D5 boosts a 3 MegaISO setting (!) - of course is more marketing than useful but, still, 102 KiloISO from this camera (as well as from Canon's 1DX Mk II) are very usable. (Nikon has also other mainstream models which have ISOs bigger than 65535)
- Sony: the entire A7 line. Goes up 400 kISO.
- Pentax: K-1 and 645z goes till 200 kISO.

Links with samples:

https://drive.google.com/file/d/0B-bKoG ... sp=sharing
(CaNikon pack of samples which contain also two samples @ 100 kISO)
(the same link from my post here: http://newsgroup.xnview.com/viewtopic.php?f=60&t=33062 )

https://drive.google.com/file/d/0B-bKoG ... sp=sharing
(Nikon D5 sample @ 3 mISO)

EXiftool show me 65535 too

xnview wrote:EXiftool show me 65535 too

Do not look at main EXIF info. Look at ExifTool MakerNotes (Nikon) or Composite (Canon) for ISO which shows that the info is actually recorded inside.

Btw, a very new/fresh version exists at http://www.sno.phy.queensu.ca/~phil/exiftool/ (perhaps it is updated to more-than-two-bytes?)

Also, perhaps you can ask Phil directly about this...

oh ok, yes for makernotes, but currently makernotes is not supported for these files