Lovely sky after the sunset on the moor at Blackstone Edge

My son and I went for a late evening walk over the moors one evening last week to try out my new tripod. It had been a lovely afternoon and I was hoping for a great sunset. The sunset actually wasn't that impressive, but the sky and clouds before and after it were really lovely. I actually took this one on the way back to the car after looking back over my shoulder and deciding it was worth getting all the gear set up again!

Camera/lens settings: ISO 1600, f/11, 1/125s, 18mm, tripod.