I shot this at dusk yesterday. As you would remember from the post The Sound of Silence, we had a very foggy start to our Saturday, but the sky cleared up in the afternoon. I got the camera out as soon as I saw the colour of this cloud band. It was an interesting dusk, because there was a normal-blue-grey sky below the cloud and also in the top right-hand corner of this frame.
Click here: Pentax K100D, Shutter speed 1/125, F 6.7, ISO speed 200.