Hi there,
just tried out to process my Raw photos from the Lumix s5D. For any reason it seems that the pictures are very dark and I would like to set the exposure to an even higher value than +4.0, what is the max value (?).
Do you have any hints for me how?
Thanks
Hi, which version of dt are you using?
Hi, on the exposure slider, right click and write a number.
Hi, you can right-click on the exposure field and enter any value you want via keyboard. Even calculation is possible ie. enter 5+5 for an exposure of 10
This sounds like a camera support issue. Normally, 0.7 to 1 EV is needed. Maybe the white levels are wrong.
can you post an example?
Version is 5.01
can you provide the raw?
We would need the raw file.
Oh, I thought that I uploaded the Raw File. Sorry.
P1000068.RW2 (34.3 MB)
Thanks for that hint. Tried it with +5. This looks good. But anyway - shouldn’t it be as kofa wrote (around +/- 1 EV)?
The whitepoint at 16319 seems odd. Also I only find black levels in the metadata. But I also don’t know about RW2 files
Sorry for the rookie question - What is usually a typical value for the whitepoint?
Should be a bit below the maximum value for the bit depth of the raw file (so for a 12-bit sensor, that would be a bit below 4090, for a 14-bit sensor, about 16300). Darktable picks a value around 16k, which seems reasonable for the claimed 14EV dynamic range (14 bits).
Also depends on the ISO. With my Canon 14 bit files I usually get something in the range of 14-15k.
It seems that results become better, wenn I change the whitepoint to around 4090 … But in the end it should be the same if I change the whitepoint or raise the exposure accordingly - right?
Some limited searching failed to provide a bit depth for still images, for video, they state 12-bit raw hdmi output … If indeed the raw is 12-bits (surprising…) a decent raw white point should be below 4096.
@Jochen : Well, no. In this case the effect may seem the same, but you get in trouble when you have some over exposure in highlights: the highlight corrections in darktable use the camera raw white point to decide which pixels are over-exposed/clipped. If the raw white point is set too high, you get colored (magenta) highlights that are impossible to correct.
Looks like there is something novel going on: I see some mention of “high gain” and “V-log” in the metadata, that might put the sensor output in some new/different (12b) mode? If you shoot in a more traditional photography mode, do you still see the problem?
This is actually what I’m also wondering! But I will have to do some experiments. I’ll be back 
