GuysWhat if any variable ND filters are you using......Singh Ray, B+W For both landscape and outside portraiture.
I have a Marumi Variable ND filter and I am very happy with it. Good quality at a good price.
You are lucky. I have one and it is unusable due to the terrible loss of sharpness.Larry
Singh-Ray, love it.Useless at 24mm and wider, like all other VNDs, but longer than 30 it's great.Graham