We knew it was going to be a "goody" and it turned out to be...............Samyang are getting very big with their very competitive range of video lenses, going are the days of spending fortunes to make a pro video!
it's worth mentioning that there doesn't seem to be any focus shift when stopping down which is useful especially using (non)-cinematic mode when struggling to MF.
The Eg-S super precision focus screen (for 5D mkII and 6D) will work well with this lens. Also, considering its relative absence of aberrations, it will work well with a focus confirmation chip?
I use that focus screen and it is no pain. Also with my MF 135mm f2.8. And 55mm f1.2. And 85mm f1.8. And 140mm f1.8 lens. Of course, only with steady subjects.
The build quality *looks* great: but according to Roger at Lensrentals most of the good looking Samyangs are held together with glue and tiny screws on the inside, in a way which makes elements more like to dislodge under impact and so forth...
By the way there is an E-mount version of this lens; it's be nice on a A7II with IBIS and decent focus magnification,,,