Olympus's versatile early MFT zoom with motorised zoom and macro mode.
The Olympus M.Zuiko Digital ED 12-50mm f/3.5-6.3 EZ is an early Micro Four Thirds zoom with a unique feature set, launched around 2012. Covering a 24-100mm equivalent range, it includes a motorised zoom mode and a macro function that provides 0.36x magnification. It was often bundled with the OM-D E-M5.
Optical quality is average with decent centre sharpness but soft corners, particularly at the telephoto end. The motorised zoom via a switch on the barrel is smooth but slow. The macro mode at 43mm provides useful close-focus capability. Build quality is good with weather sealing when paired with a weather-sealed body. The f/6.3 maximum aperture at 50mm is limiting.
Micro Four Thirds mount only, 52mm filter thread. This was an unusual lens for its era, trying to be both a walk-around zoom and a macro lens. It has been largely superseded by the Panasonic 12-60mm f/3.5-5.6 and the Olympus 12-45mm f/4 PRO.
Cheap used. The motorised zoom mechanism is the main point of failure to check. Test both manual and motorised zoom modes. The macro function is genuinely useful. An interesting and capable lens but the slow aperture and average optics mean most users would be better served by newer alternatives.