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Bug #12683

Fujifilm X-T2: Exposure dependent on ISO setting

Added by Christoph Schmidt 11 days ago. Updated 11 days ago.

Status:
New
Priority:
Low
Assignee:
-
Category:
Darkroom
Target version:
-
Start date:
06/06/2019
Due date:
% Done:

0%

Affected Version:
git stable branch
System:
Ubuntu
bitness:
64-bit
hardware architecture:
amd64/x86

Description

I took a series of photos with ISO values from 200 to 12800 on my Fujifilm X-T2. The exposure was kept the same by adjusting the shutter speed, all other values (aperture, white balance, ...) were unchanged.

When looking at the in-camera JPGs, the exposure stays pretty much the same for all ISO values / shutter speeds:

https://drive.google.com/open?id=1qH9VD9m4070njc7Twpkvl16lkLv0StXK

When importing the raw files into darktable 2.6.2, only the ISO values from 200 - 320 match the exposure of the in-camera JPG. From ISO 400 - ISO 640 all photos are about one stop underexposed, photos with ISO 800 or higher are more than two stops underexposed. To demonstrate the problem I exported the RAW files into JPG with the default settings applied by darktable:

https://drive.google.com/open?id=14Kl4jRepfRGMI1UkA1g6ODiU9Va39Ffo

As reference I also provide the RAW files:

https://drive.google.com/open?id=1CeC5fHZuuvzhgcv60KyifEJpZWFusvgw

Please note that I use darktable 2.6.2, but this version is not available in the "Affected Version" drop-down box.

History

#1 Updated by Christoph Schmidt 11 days ago

This may be the same issue as #12616.

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