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Image stabilisation

It’s hard to know whether to deal with this under lenses or under cameras. This is a range of technologies designed to compensate for the effects of camera shake, allowing you to get sharp images at slower shutter speeds than would be possible without it. With compacts and ultra-zoom cameras it is naturally built-in to the camera but some SLR makers – notably Nikon and Canon – build this technology into the lens instead. This has the obvious advantage that you can retro-fit a stabilised lens to an older camera. This technology goes by many names: image stabilisation, vibration reduction, vibration control, SteadyShot, and so on.

It’s generally a good thing, but (there are always buts!) it has limits. You still can’t hand hold the camera and get a sharp picture at, say, 1 second shutter speed. Also, stabilisation only compensates for camera movement. It can’t do anything about blur caused by a moving subject. It certainly does not mean you can entirely forget about shutter speed. If you are using a stable tripod, it’s best switched off – or it will try and compensate for movement that isn’t there, and may actually introduce some camera shake!