1. High-speed, standard zoom lens
2. Holds its fast f/2.8 maximum aperture over the entire range of focal lenghts
3. Minimum distortion throughout zoom range

15 elements in 12 groups
Closest Marked Focusing Distance [m] 0.6
Filter Attachment Size [mm] 62
Dimensions: Dia x Length (extension from lens mount), [mm] 71.5 x 94.5
Weight [g] 665