How do Olympus Zuiko lenses compare to the competition?
When introduced in the 1970s, the Zuiko lenses were state-of-the-art. Today, they are still on a level with competing Leica, Nikon, and Zeiss designs of that era. Third-party competition (e.g., Vivitar, Sigma) is much stronger than it once was, and some third-party lenses now equal Zuiko lenses in optical performance.
