It's a vague term because it can mean anything from the slight magnification of the zoom lens on a compact digital camera to the 8-10x magnification of lenses used by professional sports photographers and the paparazzi. Most lenses these days are zooms, so they have a variable focal range, but it's still possible to classify lenses broadly as 'wideangle', 'standard' or 'telephoto' zooms. This picture was taken with a superzoom camera at maximum zoom (500mm equivalent). The longer the focal length (magnification) of a lens, the more skill it takes to use it. Any camera shake is magnified too, which is why image stabilisation systems are often used to keep the picture steady.Telephoto
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Telephoto lens
It's a vague term because it can mean anything from the slight magnification of the zoom lens on a compact digital camera to the 8-10x magnification of lenses used by professional sports photographers and the paparazzi. Most lenses these days are zooms, so they have a variable focal range, but it's still possible to classify lenses broadly as 'wideangle', 'standard' or 'telephoto' zooms. This picture was taken with a superzoom camera at maximum zoom (500mm equivalent). The longer the focal length (magnification) of a lens, the more skill it takes to use it. Any camera shake is magnified too, which is why image stabilisation systems are often used to keep the picture steady.