Excited to dig into this profile. I have been using VH S-Log with great success but am always interested in trying out new profiles. Just purchased Z-Log this morning and will shoot with it later, but I will ask a question up front because it is something that had been bugging me with VH S-Log.
Why do these profiles clip shadows and highlights early in the histogram? Separately, they also require 235 or lower setting on zebra for them to show up at all. Without much knowledge, it would lead be to believe that, at the highlights end, these profiles throw away some of the largest buckets of data. Neither Flaat nor Nikon profiles clip the histogram like this. Being this is the second high quality "Log" curve to do so, I have to imagine there is some benefit to it.
Finally, how does the author of this profile get special access that the rest of us don't get through Nikon's desktop profile editor to remove the sharpness or did they just use that tool? No shame either way, if it is good, it is good. I just think the marketing of that seems a little misleading, especially when it is compared to Nikon Standard rather than Nikon Flat with sharpness turned all the way down.