In 1994, Carl Zeiss unleashed their Contax G1 on the world. While it pioneered the concept of an autofocus rangefinder, its passive-only focusing system struggled in low light.
The solution was the Contax G2, which followed a couple of years later. The G2 resolved the problem by implementing a hybrid autofocus system combining active infrared triangulation with passive contrast detection, making it significantly faster and more reliable.