Three years after the D-20 came out, ARRI redesigned and redesignated the camera as the D-21. Still straddling the terms “experimental” and “production-ready,” it was intended for TV production so as not to interfere with sales of film cameras. Like the D-20, it was a bit cumbersome, a rental item only, later reluctantly for sale, but the images were very good. By 2008, there were 56 D-21 cameras at 13 rental houses worldwide.