This photograph was taken in march 1997 from the roof of my home (in Lima). The sun was almost set when the sky brightened again due to reflections of its light on the clouds (which you can see very orange in the photo). 1/30 sec., f/3.5 with my lens set to 35mm; I handheld the camera. It is overexposed because the sky wasn't really so orange and so yellow. It may seem as though this photo would have vignetting, but it really hasn't; it is due perhaps to overexposure (???).