This is Canon's an L-series prime wide-angle wide aperture, f/1.4, lens. It has all the professional features.
Angle of view (Horizontal): 54°Angle of view (Vertical): 38°Angle of view (Diagonal): 63°Lens construction (elements/groups): 14/11No. of diaphragm blades: 9Minimum aperture: 22Closest focussing distance: 0.28mMaximum magnification: 0.21xDistance Information: ProvidedAF actuator: Ring USMDust / moisture resistance: YesFilter diameter: 72mmMax diameter: 80.4mmlength: 105.5mmWeight: 760g
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