Canon EF-S 10-18mm f/4.5-5.6 IS STM Lens + Free Lens Cap Keeper. What’s In the Box. Canon EF-S 10-18mm f/4.5-5.6 IS STM Lens. 16-28.8mm (35mm Equivalent). Aperture Range: f/4.5 to f/29. One UD Element & One Aspherical Element. STM Stepping AF Motor. + Free Lens Cap Keeper. Canon EF-S 10-18mm f/4.5-5.6 IS STM Lens Specifications. […]