Send me a PM and I'll give you a link to the ones I downloaded last year in the thread you referenced. Just unzip and drag them into the Capture One folder with the other DSLR profiles and Capture One will see them.
Problem! It seems that there is only one profile and if my guess is right it's the landscape one. This makes it semi redundant. I got awful over saturated colour when I used this profile on a flower image earlier, it blew the red channel completely losing all detail.
Is it not possible to have all the profiles, or better yet does anyone know how to simply convert the profiles for use in capture 1
I wonder if it's a simple case of changing the file type to.icm?
I did not create the profiles, so I don't know their pedigree. They are .icm files and were created by Nikon. I don't have any information beyond that. They don't do anything strange when I use them in Capture One, although I don't find them better than the ones Capture One provides.
Your comment about them possibly being the "Landscape" ones makes me wonder if you were looking for the Picture Control presets in Nikon Capture NX. Those would be the equivalent of Styles in Capture One.
The ones you got from me are .icm files that would be used by someone who prefers the look of RAW images produced in Nikon Capture, but would rather use Capture One. They are used instead of the ones included with Capture One.
Once the folder is unzipped the contents should be copied into the folder containing the other Capture One DSLR .icm files. Then the Nikon produced D3X camera profile can be applied to your images rather than the Capture One version. Normally there is only one camera profile per body.
This is exactly what I assumed as well, they work find on most images. It wasn't until today that I noticed it was doing something weird to my flower shot. It was a basic macro style image of a red flower in bloom, in capture NX it looked great, in C1 it looked great, but as soon as I selected the Nikon profile in C1 the red became blown out/contrasty and lost detail.
I do realize they are just .icm files and not styles, I wonder about the tone curve though, maybe it's possible the .icm tone curve doesn't work well with the C1 styles for all images, particularly the flower image. I think the best thing would be to post examples, but not sure how to do that here, I will perhaps look into it, in the mean time I will have a look at what C1 is doing and try to decipher why the red channel is becoming blown out.