The five zoom groups make the length only 121.5 mm. With rear focusing, the lens does not change length or rotate during focusing. Any filter effects therefore remain intact. It also makes autofocusing quick and quiet.
- Lens construction: 13 elements in 10 groups
- Diagonal angle of view: 24°-8°-15°
- Focus adjustment: Rear focusing system with USM
- Closest focusing distance: 1.5m / 4.9ft
- Zoom system: Rotating type
- Filter size: 58mm