Want to shoot a famous landmark in beautiful, golden, late-afternoon light - but there are busloads of tourists all over the place, taking endless selfies? Hours of Photoshop work to clone them out?One solution is simply to take a long-exposure. For this image, I shot a 4-minute exposure, using a 10-stop ND filter. The only things that show up in the image, are those things that stood still for the majority of those 4 minutes. None of the tourists taking selfies held still for more than 30 seconds or so - which means they've disappeared, like magic!