Here's another opinion on ND grads ....
I had problems with a couple of Lee grads, despite most of the top pro's recommending them (and in one case, being paid to do so, presumably). Don't know why but I had some strange colour casts when using them.
After that experience I decided to go for a top brand - "Galen Rowell" by Singh-Ray from the States. They are expensive but the exchange rate is good, and you can order them from the Singh-Ray website, where there's also lots of info about using grads. The filters are fantastic, by the way, with no noticeable colour cast at all. Available in two sizes.
I was very pleased with a one-stop hard grad and recommended it here a few days ago; however, without wishing to mislead, I usually use it with a polarising filter as well, which may account for the success I'm having with it. Whatever, that combination gives great results without their use being apparent.
I used a two stop previously, which was sometimes too much as the sky could appear too dark. Sometimes you want a more brooding sky, however, and the 2-stop is better for this. And you can combine them for real drama.
You don't actually need to use a holder. I hold mine against the rim of the lens, or the polariser if I'm using one. It saves a lot of messing about with bits and bobs.
I've never used soft grads, it would be quite interesting to try one or to hear in what situation they work successfully.
Hope that's helpful.
