Canon EF-S 55-250mm F​/​4-5.6 is STM Telephoto Zoom Lens The EF-S55-250mm f​/​4-5.6 IS STM is a lightweight and compact zoom lens which offers excellent image quality, usability and affordability. It features a new 6-group optical zoom system, a rear focus system and the use of a stepping motor (STM) to provide fast, quiet auto-focusing for still photography and quiet, smooth AF when used with Movie Servo AF function in movie shooting. Filter size: 52mm drop-in Max aperture: f​/​4 With STM motor and IS Brand Canon Focal length description 55-250mm 1:4-5.6 Lens type Telephoto Compatible mountings Canon EF-S Camera lens description 300 millimeters Maximum focal length 250 High magnification, compact and lightweight EF-S telephoto zoom lens with Image Stabilization for up to 3.5 equivalent stops of shake correction. Based on CIPA (Camera & Imaging Products Association) standards. Testing performed using EOS 7D at focal length of 250 millimeter (400 millimeter in 35 millimeter equivalence) One UD lens element reduces chromatic aberration throughout the zoom range, for excellent image quality with high resolution and contrast New six-group zoom system provides a compact design while achieving a maximum magnification of 0.29x at the telephoto end Minimum focusing distance: 2.79 feet; 0.85 meter (full zoom range) Kit includes lens, lens cap E-58II, lens dust cap E, instruction book, warranty card Compact and lightweight with Optical Image Stabilizer Features Canon's amazing STM stepping motor and a newly designed high-speed CPU, rear focus mechanism and improved AF algorithm for high-speed performance, supporting Canon's Movie Servo AF for smooth, quiet and continuous focus adjustments The front element does not rotate, ensuring easy compatibility with accessories like polarizing filters 58mm Filter Size 0.85m Closest Focusing Distance