Prev 18 of 31 Next View full size View slideshow View more information Helicopter crew filming spectators Helicopter crew filming spectators When we talk about photography often we are concerned with blur. Blur occurs if you or the subject of photography moves during the exposure. There are a number of techniques aimed at reducing the blur: increase the shutter speed, stabilise the camera on a tripod, buy a camera or lens with image stabilisation built in like the Canon EF IS lenses and so on. Seeing this camera man filming the crowds below from an open helicopter brings an interesting question: how do you keep images stable in a moving and vibrating helicopter? I would imagine just sitting in the open door like that presents a challenge of its own.