- Aperture: Constant f/3.5 throughout the zoom range
- Focal Length Range: Equivalent to 16-32mm on a full-frame camera
- Optical Elements: Two ELD (Extraordinary Low Dispersion) elements and one SLD (Special Low Dispersion) element
- Aspherical Elements: Four aspherical elements for improved image quality
- Super Multi-Layer Coating: Reduces flare and ghosting
- Autofocus System: Features a Hyper Sonic Motor (HSM) for fast and quiet focusing
- Diaphragm: 7-blade design
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