L1) 17-50MM F2.8 DI II F/CANON Construction: 13 Groups/ 16 Elements Diaphragm: 7 blades Angle of view: 78 at 45' - 31 at 11', (APS-C size equivalent) F stop range: 2.8- 32 Closest Focusing Distance: 10.6in. (0.27m) Maximum Magnification: 1:4.5 Maximum Aperature: f/2.8-4