Help importing raw fies from Canon 1Ds into darktable

I have a set of tiff files that are raw files from a Canon 1Ds. When I import them into darktable, they appear only as if there is the small preview. I can’t see any other image data. How can I see the actual raw data?

I’ve been looking into this for a while now and am stumped.
Thanks,
-Matt

P.S. this is the output from ‘darktable --version’. I’m running the docker version from linuxserver.io

darktable 5.2.0
Copyright (C) 2012-2025 Johannes Hanika and other contributors.

Compile options:
Bit depth → 64 bit
Debug → DISABLED
SSE2 optimizations → ENABLED
OpenMP → ENABLED
OpenCL → ENABLED
Lua → ENABLED - API version 9.5.0
Colord → ENABLED
gPhoto2 → ENABLED
OSMGpsMap → ENABLED - map view is available
GMIC → ENABLED - Compressed LUTs are supported
GraphicsMagick → ENABLED
ImageMagick → DISABLED
libavif → ENABLED
libheif → ENABLED
libjxl → ENABLED
LibRaw → ENABLED - Version 0.22.0-Devel202502
OpenJPEG → ENABLED
OpenEXR → ENABLED
WebP → ENABLED

What happens when you double-click the thumbnail or press D when it is selected?

In darkroom view, I just see the low-resolution preview. I can’t figure out how to get to the actual raw data.

Can you share a file here?

Just tested with the sample from raw.pixls.us and if you change the extension to .crw or .cr2 (not sure which is more correct), darktable opens it just fine.

That works, thanks! I changed the extension from .tif to .cr2 and it imports as expected. I’ve been pulling my hair out trying to figure this out and the simple solution was in front of me the whole time.

Thanks again!
-Matt

1 Like

Seems like something happend since darktable 4.8. I am running 5.0.1 with the same error. darktable is picking the thumbnail instead of the raw image from the tif file.

Changing in darktablerc

libraw_extensions=tif

work for most images, but sometimes the same image doesn’t work one time but works the next time…

This image worked 1 minute ago. I had to restart darktable to get it to work again.

Issue here Canon EOS 1Ds TIF broken in rawspeed · Issue #870 · darktable-org/rawspeed · GitHub

See this.