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Title: This lens is BIG AND HEAVY!
Review: I bought this lens to use for children's portrait photography and quickly learned that it will not work simply because the lens is too big and heavy to use while chasing around a child. It also does not have images stabilization (IS). The Canon EF 24-105mm f/4 L IS USM Lens is much smaller, has IS, but has a wider aperture (f4 instead of 2.8) - a welcomed trade-off after my experience. The worst part is I had to pay $50 to return it to Amazon.com since it needed to be insured - and they don't reimburse you for that cost so my recommendation is to go to a camera shop and at least hold the lens in your hands before purchasing!
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