The most bad-ass film stock on the planet. Also among the hardest to use. It's ISO50 slide film, with very narrow shoulders. I have never worked with film this advanced before. It will be a significant challenge to get good results with it. Done right, Velvia is very rewarding: it has such a fine grain, it's detail level is equivalent to a ~20MP sensor, and it has color saturation and contrast that no digital camera can match, period.