While other lens types behave like the human eye (things that come nearer appear to grow) – Telecentric lenses keep the size of objects! This makes them perfectly suited for measurement applications.
In general, telecentric lenses are C-Mount lenses. Just a few have different Mounts. They are mainly used in Industry, esp. automotive Industry. The other lens types behave pretty much like the human eye – things that come nearer appear to grow. Telecentric lenses however keep the size of objects! This makes them perfectly suited for measurement: you can determine the object’s size even when you don’t know it’s distance.