No. The OM-3 is a completely mechanical camera and you will get the shutter speed and aperture that are pre-set, just like the OM-1. The OM cameras with electronic shutters (OM-2, OM-2N, OM-2S Program, OM-4, and OM-4T) will make an adjustment during exposure and close the shutter based on an Off-The-Film, real time meter reading. Only in Auto mode.
Originally Posted by Les Sarile