[anyscreenamewilldo]

… i don't know if this will help here but maybe …here is an example of nd vignetting adjusted three ways for full frame @16mm ff -



- i've only ever taken two shots with this 10 stop nd b&w filter, this is the second one -



- so, a screw in filter without the grad or the flat handheld hitech + seagulls flew in front of the camera at the time - so movement maybe not so much of a problem, but handheld, the grad and reflections or flare maybe a worry -



1635za @ 16mm, f10 & 5sec - soldiers beach looking south -



vg correction in c1 and highlight/shadow correction in Ps -





no vg correction but h/s correction inPs -





no vg correction or h/s, just levels -





. . . hopefully almost anything's possible