wrong ISO values

[BonChi]

Hi,

Today I noticed, that the ISO values in EXIF section are wrong. On my Digital Camera Sony Alpha 7 RV I have the ISO 102.400 in EXIF data in XNView the value is 65.535. It seems these discrepencies occur for all ISO values >65.535.

Please check it and fix it. Todays cameras can a lot more than 65.535 .

I am using XNView MP 1.7.2 64bit.

Greetinx BonChi

[xnview]

please send a sample file

[BonChi]

https://drive.google.com/drive/folders/ ... sp=sharing

Here is a picture with ISO 102.400. I notices, after copying to my HDD, Windows shows in the properties for this picture also ISO 65.535.

[xnview]

ISO field contains 65.535, ExifTool shows this value too

[BonChi]

Ok, I wonder what's the matter, the file was not modified by copying to the HDD, and look at this picture, what my camera is saying:

[BonChi]

Hi Pierre,

I tried the following: I copied the picture which is linked above back to my camera using another file name. I selected the picture on my camera and looked into EXIF data, and there are again 102.400. That means, that the correct ISO value is in the file, but Windows ignores that and makes the highest possible value out of it.

Using other picture viewers they also show ISO 65.535.

[xnview]

I tried the following: I copied the picture which is linked above back to my camera using another file name. I selected the picture on my camera and looked into EXIF data, and there are again 102.400.

with which app?

[BonChi]

No App, using the firmware of my camera.

[xnview]

No App, using the firmware of my camera.

ISO is saved in another field (Makernotes) i think

[BonChi]

I am afraid I can not help you with that. If I use the Sony software for reading out EXIF data, the field is called ISO. I guess the internal name could be the one you mentioned.

[user0]

how it looks in other apps

iso_102400.png

[xnview]

'Recommand exposure index' is shown as 102400 in Xn