For you landscape photogs out there, I've been using the feathering technique with success in my photography. By using this technique, you move the GND during the exposure as to not see the grad line. You can do this with a holder or hand held. It does take some practice but, once you get used to it, you'll definitely see a difference.
Here's a Youtube link that maybe helpful to you. Enjoy!
http://www.youtube.com …xdCfbE2FI&feature=related![]()

