This is my only OM Zuiko tele lens, and I do not use it much lately. Although not the fastest lens, granted, it is nonetheless sharp enough for what I need, when I need it to be that is. In my possession since the very early 90s, it has seen a lot of action until the dawn of 2000s. Not much use after that for this excellent OM Zuiko Auto-Zoom 75-150mm 4, what with my self-imposed restriction to prime lenses for the most SLR cameras I own.