This is an older shot from last winter, when I spent the weekend in the south of Portugal. I was actually walking along the cliff tops to get to another location in order to shoot the sunset, when the sun broke through a hole in the clouds, illuminating the cliffs and causing the rainbow to appear.
I didn't really have much time to find an interesting composition, and only managed to shoot two frames before the sun disappeared for the rest of the day.
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Taken near Carrapateira, Costa Vicentina, Algarve, Portugal Nikon D3 w/ Nikkor 17-35mm f2.8 Gitzo GT2541 tripod w/ Gitzo GH1780QR ballhead Hoya ND400 9 stop ND | Lee 0.9 3 stop hard grad | 30 secs | f13 | 17mm
Workflow in Nikon Capture NX2. Resize for web PS CS3