Hi, Mark! I sent one of my NEF-images to your e-mail adress which is on your website. The file is 27 MB, should be OK to mail it. Oherwise I can send it by e.g. sprend.
Thanks a lot for your help!
Thanks for the file. I opened it using the "Pure Raw" setting of the Raw Format Preferences in DSLR_RAW of Format Explorer. But it opens as a greyscale version of the colour image and not as a CFA raw. In other works, DCRaw is not handling this half-size format properly. If it's any consolation, DeepSkyStacker and Iris can't open it either.
I suggest that in future you shoot full size images with your D810A - that should work.
For the data you already have, you can open them as colour images (e.g by using the "de-BayerRGB" setting of the Raw Format Preferences in DSLR_RAW of Format Explorer) then align and stack them. But you won't be able to use your flats, darks and bias files.
Mark