Most likely taken with a Digital Back MF, or a DSLR. You can have a digital back MF for about $10K. remember that these fashion photographers at the high end, are paid very well and have teams of people work with them to create the final image you see. Often having digital art background (ie not photographed) etc. I doubt any high end fashion photographer uses film these days. A lot of what you see in those enormous prints has been edited to the point that if you saw the original RAW file you would not think they were the same photo.