Noktor lenses look very much like the CCTV lenses that a company called Goyo Opticals in Japan makes. In fact, if you compare the Noktor 50mm with the Goyo 50mm, the lenses look like two peas in a pod, except that the Noktor has been dressed up with a lime green strip.
Not the sharpest lenses in my opinion, and if you gonna blow $1k on the 50mm, there are many many legacy primes out there that you can buy with that money.
It seems the vignetting is due to his fader ND, not big enough. This is normal for such a wide lens. It will be at $ 500. I have the same concern for the green front as most of the time for video people will be using filters so perhaps should communicate to the manufacturers about the green front before production. They will have another with black or silver I think was mentioned.
seems like a nice lens, but the vignetting is big and also, when he points directly to the sun we can see a reflection from the yellow band that is in the front of the lens, wich ain´t good either, how much does this cost?
this sebfarges video is good, but there is strange vignetting in some shots at 1.6 and 2 that isn't there on others at the same aperature, and there look like changes in exposure, maybe he is using idynamic, or post color corrrection? edit: could also be from a fader nd sliding around maybe? I have only used matte box nd filters, don't know if that sort of thing happens with a fader
That lens has a real unique character. It kind of has an old school film look to it IMO. I don't have the proper words to describe what it looks like to me, but that's how it made me feel.