Title: Good lens to have in your bag...
Review: I have this lens and the teleconverter. The only drawback I have so far seen is that there is a dark arch in the bottom of the pictures when using the flash. I wish Canon had designed in threads for a UV-Haze filter, but they did not. That's a big piece of glass to be hanging out there with no protection from scratches and fingerprints. Be careful. Do not let idiots and people with butterfingers use your camera when this lens is attached. Rather, never let idiots and butterfingered dimbulbs use your camera. Period.
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