Go further with EOS
Choosing your EF lens
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About Canon EF lenses
EOS digital SLRs are backed up by the world's most comprehensive system of interchangeable lenses. From 8mm ultra wide angle to 800mm super telephoto, the 60+ lenses in the EF series cover all possible shooting requirements. See the world from new perspectives. Capture your vision through the eyes of EOS.
What sets the EF lens range apart? Innovation. Canon has been pursuing the perfect lens for more than six decades. This pursuit has generated a raft of pioneering technologies, the very best of which are found in today's line-up.
Camera shake is a major cause of blurred images, especially with handheld photography or in low light situations where a slow shutter speed is required.
Canon's Image Stabilizer (IS) technology uses a lens shift-type system to detect and correct slight camera shakes. Pressing the shutter button halfway releases the lock on the Image Stabilizer system. Minute gyro sensors detect lens vibrations caused by hand shake and send a signal to a microcomputer, which controls an IS lens group that compensates for the pitch and yaw (movement along the horizontal and vertical axis of the camera) of the lens. To ensure that intentional panning and tilting isn't mistaken for camera shake, some telephoto and tele-zoom lenses have IS Mode 2. This mode detects if movement in a certain direction occurs for longer than a preset time and switches off the Image Stabilizer in that direction.
EF lenses with IS technology enable steady shooting at up to four stops lower than is possible with conventional lenses, making them ideal for situations where the use of flash is not permitted or desired.
Canon's Ultrasonic Motor (USM) was the world's first lens-based motor to harness ultrasonic oscillation energy. Electronic vibrations created by a piezoelectric element power the mechanical action of the lens. This technology makes focusing precise, virtually noiseless and incredibly quick – some lenses focusing literally faster than the human eye. The USM starts instantaneously and stops the moment focus is achieved, with no overshooting. What's more, the USM requires minimal battery power so you can shoot for longer on a single charge.
Two types of USM are used in Canon EF lenses: Ring-type USM and Micro USM. Ring-type USM is found in large-aperture and super telephoto lenses, while Micro USM is used in more compact lenses.
*Not all features are available on all lenses, please refer to your product's specification.
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