As I have a great passion for old glass, I just added a Sankor 16 anamorphic adaptor to my kit. It perfectly adapts to old lenses like the Nikon Nikkor primes. Additionally I made sure it comes with all the step-up/step-down adaptor rings, as well as a diopter for close focus.
This kit is a great option for documentary style shooting and indie film production.
I have been using the lens on the Sony FS5 and recording externally to my Shogun Flame in 4K/25fps.
Here is some test footage from the set up.