The Buffington Effects Tracker LED is a little device that will allow visual effects crews to create tracking points that are highly visible yet are small in size so that less work will be needed to paint them out in post. Using a tracker that emits its own light has the advantage that it creates a more visible streak if the camera is being moved. This tracker is also useful for chromakey shoots where there is a background that has no detail. The body of the tracker is 1.1"x.63"x.27" (28x16x7mm) the battery protrudes slightly from the sides and is .78" (20mm) in diameter. By attaching the tracker to the background using chromakey gaffers tape with a small hole for the LED, you will render the tracker virtually invisible to keying software except for the LED itself.
This tracker has a useful run time of 5 to 10 hours depending on how brightly the set that it is being used in is lit. It uses CR2032 batteries which can be purchased at local stores such as Radio Shack or most drug stores so if your shoot runs long you will not need to worry about not being able to replace batteries.
Standard LED colors are red and green but other colors will be available as a special order.
Trackers are sold in packs of 10 for and include a battery for each tracker. $50
Additional batteries are available at $.85 each.