A version for instrumentation (and traffic) was also created on the basis of the Royal design: the Recorder. These cameras were like the Royal but without viewfinder or rangefinder. They had interfaces to motors and detachable backs to support bulk film cassettes. A special parallel series of the Royal too was available that included these features. While the Royal had only limited market success, the Recorder was well accepted. It became the centerpiece of the company's portable document capture, traffic control and security solutions, and continues to be the standard Robot camera for instrumentation applications.