Konica Minolta Autofocus 100-300mm f/4.5-5.6 APO Lens for Maxxum SLR Cameras For use with Minolta Maxxum Autofocus SLR cameras Focus and exposure data flow from lens' ROM integrated circuit to camera's central processing unit Accurate focus from infinity to 4.9 feet; 4x zoom ratio Built-in distance encoder for accurate flash exposures Uses 55mm filter