Samsung 50-200mm F4-22 Telephoto Zoom Lens For All NX Models: Technical Information Focal Length: * 50-200mm Magnification: * 0.20x Aperture Range: * f/4 to f/22 Focus Distance: * 38.58" minimum Filter Attachment Diameter: * 52mm Lens Construction: * 17 elements in 13 groups Viewing Angle: * 8-31 degrees Physical Characteristics Dimensions: * 2.8" x 4" Weight: * 14.71 oz Compatibility: * All Samsung NX models