The combination of Digital RevTV, Chase Jarvis, and a Lego Camera was always going to be a solid bit of fun. Rather unexpectedly though it is also a valuable learning experience. If you watch the video you will find that Chase inadvertantly, perhaps habitually, talks through his approach to each situation and explains how he will work around the limitations of the lego camera. He does this by anticipating the shutter delay, figuring out what the approcimate focal length is, and even building upon the basic system through the use of external flash and an ND filter.
For those unfamiliar with the triggering trick here's how it works. Most external flashes have a slave mode. When the external flash is in this mode it will fire whenever it detects that another flash has been fired. The other flash doesn't have to be particularly powerful either, it just has to be powerful enough for the external flash to see it. Here then the external flash (the SB-900) is triggered by the lego cameras flash giving Chase control over an external flash.
The ND filter is required because when the lego camera is in flash mode the settings lock to correctly expose the image for the lego camera flash. The external flash is stronger (brighter) than the lego cameras flash which then leads to the image being overexposed. The ND filter acts like a pair of sun glasses for the camera, cutting down the amount of light that enters the lens bringing the image back towards a correct exposure.
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