I shot this using my Sony RX100 pocket camera. I had been in Spain walking the Camino and weight considerations ruled out my bringing a heavy DSLR. I had a few hours to spare in Bilbao on the way back so I went to the Guggenheim around 8am. I put a lightweight pocket tripod on to the Sony and used the self-timer set at 10 secs to further minimise camera shake. I was happy with the results (the Sony produces outstanding image quality). I used Nik Silver Efex to convert it to B&W and added in the sky from my collection of long-exposure skies.