So if you REALLY want a zoom lens...this is not the lens to EVEN consider buying. If you're looking to spend very little money, look for this cheap some place. I sold it for about $100 cheaper than I bought it because I was desperate to get rid of it. I can't afford "L" lenses on my student budget, but I definately can't afford cheap, low-quality garbage. I don't care that it has a Canon logo on it. This lens is absolutely horrible, and to be honest with you, if you're considering buying it, my only advise is, make sure you have the sun as your light source, that you're using minimum ISO 800 film, and that you're taking photos of non-moving objects...
One word sums up my opinion on this lens: POOP.