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It is possible to shoot a Brickfilm with any webcam. But there are some things I would look for if I was to buy a new webcam for this purpose:
- I prefer notebook webcams, as these models are generally smaller and often come with a clip to attach them conveniently to extremely simple LEGO camera rigs.
- Webcams with a CCD chips result in better images than CMOS-based web cams because of their higher sensitivity, which reduces the amount of noise in the image.
- My first webcam had a wide angle lens, which required it to be placed closer to the action. This increased the risk of accidentally touching the webcam while animating. It is my experience that it is then almost impossible to re-align the camera exactly as it was before, so the shot is spoiled.
- Ensure the webcam has a manual exposure setting. If exposure is under full control of the webcam itself, it is extremely difficult to make close-up shots without huge illumination problems.
- Ensure the webcam has a manual white balance setting. Webcams that only support automatic white balance will distort your colors if there is insufficient white (or gray) in your picture. If your camera only supports automatic white balance, the solution is to always have sufficient white areas in your picture. A useful trick is to set the webcam to a higher resolution than the recorded image and position white bricks just outside the capture area. This will often trick the camera into choosing a sensible white balance without the bricks themselves showing up in your scene.
- Ensure if the webcam has the possibility to (gently) adjust focus to make the object of interest clearly visible in your shot.
I am at this moment happily using a "Logitech QuickCam for Notebooks Deluxe" myself.