I've used the rokinon 7.5 with great success. Very little unwanted flare etc. I can take seascapes pointed directly at a hot setting sun and get a beautiful 6 pointed sunstar. very cool. However, it's a fish and not easy to attach my reverse grad or nd400:-( Im currently using the 14-150II for that sort of thing and its great at all sorts of things, but not controlled sunstars. Can you recomend a zoom or prime uwa or even a wide that does all of the above?