Webcams are good for the brickfilming hobbyist, and I'm pretty sure most brickfilmers start out with a webcam. So I'd recommend getting a webcam, then later if you feel like you're really into brickfilming and want to invest a good amount of money into it, go buy a camera. A good camera for brickfilming will usually cost upwards of $500, whereas webcams cost between $50-$100. The Quickcam Pro 9000 is a little old school, but the quality is pretty good; I've had a webcam that's pretty much the same as the 9000 for several years, and I'm very happy with it; however, many people say that some of the newer models have better quality and whatnot, so you may want to wait on their expert opinion before deciding which webcam to buy. Also I'd imagine the newer models are easier to find.
kcirb-- its brick backwards.
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