Specifications:

Brand Canon
Focal Length 55 – 250mm
Comparable 35mm Focal Length: 88 – 400 mm
Aperture Maximum: f/4 – 5.6
Minimum: f/22 – 32
Camera Mount Type Canon EF-S
Format Compatibility APS-C
Angle of View 27° 50′ – 6° 15′
Minimum Focus Distance 2.79′ (85 cm)
Magnification 0.29x
Maximum Reproduction Ratio 1:3.45
Optical Design 15 Elements in 12 Groups
Diaphragm Blades 7, Rounded
Image Stabilization Yes
Autofocus Yes
Filter Thread Front: 58 mm
Dimensions (DxL) Approx. 2.76 x 4.38″ (70 x 111.2 mm)
Weight 13.23 oz (375 g)
Package Weight 500 gms
Box Dimensions (LxWxH) 6.8 x 4.6 x 4.4″

Features:

Telephoto zoom is designed for APS-C-format Canon EF-S-mount DSLRs and provides an 88-400mm equivalent focal length range.

One Ultra-Low Dispersion glass element noticeably 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 3.5 stops to better enable working in low-light conditions and with slower shutter speeds.
Enhanced lens coatings minimize flare and ghosting in order to produce true colors with maintained contrast.

An STM stepping AF motor realizes smooth, near-silent autofocus that is complemented by a rear focus system, 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.