The Zeiss ZF are no better optically than their Nikkor equivilents. There is some advantage to being able to say "Zeiss" on your equipment list. But they are no better for the money. I think most here will be very surprised how well Nikkors and still lenses in general perform, especially recent designed for digital lenses like the 17-35mm. Remember Corpse bride was shot at 8MP using all Nikkors, and finished in 2K I believe. Other than the ergonomics of cinema shooting (breathing, gears, focus draw) I fully suspect the still lenses to compete with current cine lenses and trounce older ones.