With its built-in Image Stabilizer, shutter speeds up to 4 stops slower than normal can be used with no perceptible increase in image blur.
The maximum f/4 aperture is available at all focal-length settings, meaning exposure settings will not change as the lens is zoomed through its range.
A circular aperture gives out of focus regions a softer, more uniform feel while sharp foreground objects stand out with a smooth blurred background.
The red ring symbolises this lens is part of Canon's L-series - your guarantee of superior performance and handling with dust and water resistance.
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