Could you recommend me a good lens with a longer focus distance, suitable for that camera. For example, I would like to try and use to track people in a room, from the ceiling.
Do you have the area length and width you want to track and the distance to this area?
MT Website - A Collection of the Most Relevant Multitouch Info From These Forums
Multitouch Parts Store - Buy Infrared Touch Frames (No Camera Needed!), Complete Modified Cameras and DIY Upgrade Kits, m12/CS Mounts, m12/CS Lenses, Infrared Lasers, LEDs, etc