Greetings from Yellowstone! I've had great landscape skies since I arrived Tuesday and this morning the trend continued. This was from last night just as the sun was setting. I had to pump up my ISO as I stacked 5 stops of grad ND filters to bring up the drama in the sky and tame the highlights. I also wanted a bit of speed to retain a bit of definition in the eruption.
Canon 1D Mark lll with the 28-135mm lens at 28mm at f20 for 1/250 sec. and ISO 800. All tripod mounted on Graf Studioball and bubble level in hot shoe. I used noise ninja in PP'ing.