The OM Winder 1 was designed to automatically advances the film one full frame and cocks the shutter after each exposure in about 0.3 sec. whenever its shutter release is pressed. Benefit of using a Winder is not only saves you from distracting, time-consuming manual film winding, but also offers you enjoyment of pursuing critical shutter chance that may otherwise be lost. This manual uses the OM-2 in the illustrations but, of course, the Winder 1 can be attached to and operated with-the OM-1 or other OM models camera in exactly the same manner. Olympus has designed an upgrade to substitute the Winder 1 in later years to Winder 2 to enable continuous sequential shooting of 2.5 fps and improved its handling.