Tasco Sonoma 7-21x40 Zoom  Binocular Full-featured, full-sized porro prism modle that zooms from 7x to 21x with fingertip control Rubicon lenses comprised of 14 layers with ruby tint for reduced glare Zip focus system allows you to move through the entire focus range in less than a half-turn Magnification: Objective lens: 40mm