Canon’s ring USM auto focus system employs ultra-sonic frequency vibrations for fast, accurate and virtually silent operation with excellent holding torque. Full-time manual focus override, via a large ring that does not rotate during auto focus, allows photographers to begin fine-tuning a shot instantly. Super Spectra coatings help ensure accurate colour balance and high contrast, and suppress flare and ghosting by absorbing light that might be reflected off internal lens elements and digital EOS sensors. A circular aperture delivers smooth, even-looking bokeh (background blur) - ideal for isolating subjects at large aperture, or compelling portraiture.
- L-series construction with dust and moisture sealing
- Large f/2.8 aperture
- Aspherical and UD lens elements
- Ring USM auto focus with full-time manual focus override
- Circular aperture
- Super Spectra coatings reduce ghosting and flare