I use ND filters often. It of course depends upon the light. For me it's always the transition zone between light and dark in a scene. If shooting in a direction away from the sun I use standard Grad or ND's in 2 or 3 stop and in both soft and hard edges. If shooting towards the sun I use Reverse Grad or ND's and sometimes even stack those as required.
As I typically shoot only transparency film the exposure latitude is very narrow and the grads all help work through the shortcomings of the film.
The attached image was shot with a Reverse ND.
Last edited by Trail Images; 02-20-2014 at 08:46 PM. Click to view previous post history.