Anyone know of a cheap Digital Video-Camera that has (or can be hacked to support) External / Asynchronous triggering?
The problem of recording with multiple-cameras is, if they're not triggered simultaneously, they could be capturing their respective frames at as much as 1/(fps*2) of a second (i.e.;16.7 ms for 30 fps) off from one another; which for many, if not most things wouldn't be a concern. However, since they wouldn't capturing the event at the exact-same moment, the usability of the video information for motion-analysis purposes is greatly reduced.
For everything else other than lacking support of external/async. triggering, something like my relatively-cheap $120 ApiTek 60-FPS 1080p Camera (Std-Def would suffice) I picked-up on a whim at Walgreen's would fit the bill quite nicely.
While professional cameras do have this feature (also referred to as a Master/Slave Camera Array), this is simply for my personal-use, and I'd have a hard time selling my wife on the idea that I need to spend multiple thousands of dollars on it.