35mm Equivalent Focal Length: 229-914mm; w/ XF 1.4x TC: 320-1,280mm, w/XF2x TC: 457-1,824mm Maximum Aperture: F5.6-8; w/ XF 1.4x TC:: F8-11, w/ XF 2x TC: F11-16 24 elements in 17 groups, with 4 Super ED and 3 ED lens elements Weight: 1605g (3.53lb) Filter Size: 82mm