EF 50mm f/1.8 STM is a compact, lightweight fixed focal length lens ideal for everyday photos, and with a large f/1.8 aperture, a perfect lens for low-light photography and creative background blur EF-S10-18mm F4.5-5.6 IS STM is an EF-S ultra-wide zoom lens with an impressive starting focal length (16mm in 35mm equivalence). For expansive scenery from tall buildings to inspiring mountain ranges, the wide angle of view from the EF-S 10–18mm f/4.5–5.6 IS STM helps you achieve vivid colors and details during your travels A stepping motor (Gear-type STM) supports the Movie Servo AF function in providing smooth and quiet continuous AF during video recording, as well as when shooting photos EF 50mm f/1.8 STM:Minimum focusing distance of 1.15 ft. (0.35m); maximum magnification of 0.21x. EF-S 10-18mm f/4.5-5.6 IS STM:Full-time manual focus allows manual focus adjustment while in AF Mode EF 50mm f/1.8 STM :Circular aperture (7 blades) helps deliver beautiful, soft backgrounds.Metal mount helps provide stability and ruggedness