Guide: Accessing Nostalgic Negative on X-Trans bodies

Many many thanks! (I use Linux 99% of the time but I have a Windows double-booting partition, too - so I am going to try it myself soon).

The idea that came to me looks like this. Given that I have:

• darktable 4.0.1 software as my main photo processing tool,
• DataColor Spyder Checkr 24 color target,
• darktable-chart tool included into darktable package out of the box,

what I can now do, being a happy owner of X-Trans III Fuji X cameras?

• get all the reference values and images for the chart from the DataColor website,
• take a picture of a color chart in RAF with my camera, under the proper lighting conditions,
• install C1 21 and apply all the tweaks you described to make every film simulation from other cameras also available for my sensor,
• develop the RAF in C1 21 with different film simulation I wish to use,
• cook the input data in the format edible by darktable-chart,

process these and voila! I have a set of "styles" for darktable usable for future RAF processing, replicating the Fuji X film sim color science (also I can share these with the public, of course).

Though before I start, can you guys share your opinions and knowledge about the following, please?

1. Is DataColor Spyder Checkr 24 at all interesting for the topic described? Or the LUT built from 24 patches only can't be used reliably?

Yes I know and recognize that the proper and correct way to go is to order the IT 8.7 "CF" target and use it. (Note: the website targets.coloraid.de does not use secure connection because of the site prehistoric age, it's normal, don't be afraid to visit it). Ok, but not just right now - though if someone wish to donate a CF target to me, I will start immediately.

2. Are C1 21 provided film simulation curves for i.e. Classic Negative identical between X-Trans (say X-H2) and Bayer (say GFX100S) cameras?

The question is, will there be any difference which one to "adapt" for X-Trans III?

3. Do I need to create more than one "darktable style" for each film simulation?

Are film simulation curves in C1 21 different given:

• different ISO settings?
• different color correction and color chroma correction settings?

4. The "dtstyle" produced by darktable-chart produces three items: camera input profile, tone curve and LUT. Can I use that obtained data later in DaVinci Resolve Studio color management tab?

Thanks in advance! Regards, Andreas