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Canon EF 20-35mm f/3.5-4.5 USM full specification

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Focal length	20 - 35mm
Angle of view	84° - 54°
Max aperture	f/3.5 - f/4.5
Min aperture	f/22 - f/27
Focusing type	AF
Minimum focus	34cm
Filter size	77mm
Stabilised	No
Blades	5
Elements	12
Groups	11
Mounts	Canon EF USM
Weight	340g
Dimensions	68.9mm x 83.5mm
Discontinued	TBC

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E.g. Focal length: 300mm