Specifications:

Brand Canon
Focal Length 24 – 105mm
Aperture Maximum: f/3.5 – 5.6
Minimum: f/22 – 32
Camera Mount Type Canon EF
Format Compatibility 35mm Film / Full-Frame Digital Sensor
Angle of View 84° – 23° 20′
Minimum Focus Distance 1.31′ (40 cm)
Magnification 0.3x
Maximum Reproduction Ratio 1:3.3
Optical Design 17 Elements in 13 Groups
Diaphragm Blades 7, Rounded
Image Stabilization Yes
Autofocus Yes
Filter Thread Front: 77 mm
Dimensions (DxL) Approx. 3.28 x 4.09″ (83.4 x 104 mm)
Weight 1.16 lb (525 g)
Package Weight 750 gms
Box Dimensions (LxWxH) 7.8 x 5.3 x 5.1″

Features:

Standard wide-angle to telephoto zoom lens is designed for use with full-frame Canon EF-mount DSLRs, however can also be used with APS-C models where it will provide a 38.4-168mm equivalent focal length range.

Two aspherical elements are used to reduce distortion and spherical aberrations throughout the zoom range in order to maintain sharpness and accurate rendering.

One ultra-low dispersion element reduces color fringing and chromatic aberrations for high clarity and color fidelity.

Super Spectra coating has been applied to individual elements to minimize ghosting and flare for greater contrast and color neutrality when working in strong lighting conditions.

An Optical Image Stabilizer helps to minimize the appearance of camera shake by up to four shutter speed stops to better enable working in low-light conditions and with slower shutter speeds.

An STM stepping AF motor realizes smooth, near-silent autofocus that is complemented by advanced AF algorithms and a high-speed CPU for fast AF performance. Additionally, full-time manual focus override is also available.

Rounded seven-blade diaphragm contributes to a pleasing out of focus quality that benefits the use of shallow depth of field and selective focus techniques.