This is a M.Zuiko Digital 14-42mm f/3.5-5.6 II zoom lens from Olympus (now OM-SYSTEM). I have confirmed its operation when attached to a camera body. Zoom, autofocus, and other functions work without any problems. There is no visible mold or cloudiness under normal viewing conditions, but a slight haze can be seen when illuminated with an LED (there is no mold even with LED illumination). It may have a slight effect in backlit situations, but I believe it is minimal. It is a Micro Four Thirds mount. *This is a used item. Please refrain from purchasing if you are sensitive to imperfections.