Does the Adobe DNG converter not convert it? It should be converted in linear format (a misnomer, meaning that it is not in Bayer, i.e. mosaic format), which is still a raw format.
You're right - I'm an idiot. I tried to convert it before, and couldn't make it - just becouse there were no disk space left Thanks!
The files from NikonScan are not the same type of Raw files from Nikon cameras and are output as a tiff. They may say NEF, but they are not really.The fact that you can open them in Capture is because Capture can open tiff files as well as NEFs. To prove it, make a scan and open it in Photoshop, but make sure you have the "Allow Tiff files to open in ACR" turned off first. The scan will open in PS and not ACR. IF it were a "real NEF", it would open in ACR without the automatic preference being selected.
You're also right - after I finally managed to convert my scan to DNG, and opened it in DNG Profile Editor I just found out it is nonlinear. What an absurd...
Thanks - I'll give it a try - maybe it leaves scan in linear form, unlike that NikonScan-nonsense.