This lens is widely available from many sources, both new and secondhand. It is compact and light in weight and offers a significantly wider zoom range than the 28-55mm lens supplied as 'standard' on many Canon digital SLR cameras. Used on most Canon digital cameras, the effective focal lengths become 1.6x bigger (as the sensor is APS- sized, not 35mm sized), making it a 45 - 170mm zoom. Hardly wide-angle, but, at the lower end, it is roughly the same as the 50mm lens that all 35mm cameras used to be fitted with as standard. With digital cameras, the argument goes, you can 'stitch' several ...
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