Canon EF-S 55-250mm f/4-5.6 IS STM Lens

An STM stepping focus motor is also integrated into the lens’

design to provide smooth, quiet, and fast focusing performance

that is ideally-suited to video applications as well as tracking

moving subjects. The rear focusing system, high-speed CPU,

and an enhanced AF algorithm also contribute to quickened

overall AF speeds. Full-time manual focus is also supported to

permit fine-tuning of focus even while working in AF modes.

Additionally, the front lens section does not rotate during

focusing to better facilitate the use of polarizing filters.

The optical construction of the lens employs one ultra-low

dispersion glass element to help reduce chromatic

aberrations and distortion throughout the zoom range

while also enhancing contrast and clarity. Optimized lens

coatings have also been applied to ensure color fidelity by

countering the effects of lens flare and ghosting.Long-

reaching zoom lens provides a 35mm-equivalent focal

length of 88-400mm, covering portrait-length to telephoto

perspectives.