The Olympus Om-System Zuiko Auto-T 135 mm f/ 3.5 is an amazingly compact moderate telephoto lens at 135 mm. The construction is equipped with a built-in retractable hood.
Being rather small, it features magnificent optical qualities. It is sharp when wide open. From f/ 5.6 onward it is extremely sharp. Contrast is good, almost no optical distortions visible. Images have nice natural colors. It is quite resistant to back lighting.
In order to ensure high image quality the Olympus Om-System Zuiko Auto-T 135 135 mm f/ 3.5 uses a unique optical scheme consisting of five elements, instead of ordinary four. The extra element after MTF testing considerably improved resolution and contrast.
There were two versions. The older - Olympus Om-System E.Zuiko Auto-T 135 mm f/3.5.
By means of adapters the Olympus Om-System Zuiko Auto-T 135 135 mm f/ 3.5 can be easily mounted on modern SRL and mirrorless cameras.