Sigma 28-105mm f/2.8-4.0 Aspherical Lens for Konica Minolta SLR Cameras Dedicated to Minolta AF SLR cameras Extremely compact, weighing less than 10 ounces Lens construction has 13 elements in 12 groups Focusing range of 19.7 inches to infinity, at all zoom settings Internal focusing system and a nonrotating front barrel for convenient filter use