Canon have made various versions of this telephoto zoom lens. This one, calling itself Canon EF-S 55-250mm f/4-5.6 IS STM lens, came out in August 2013. As of writing it is the latest and best incarnation.
The main thing about the lens is the new stepping motor which is near silent and canon claimed, at the time, is perfect to go with the smaller pickups (APS-C) of the Canon EOS 70D, Canon EOS Rebel SL1, and Canon EOS Rebel T5i Digital SLR Cameras.
Canon’s stepping motor lenses allow for the capture of high-quality still and video images and reduce motor noise from the lens so cameras, such as the Canon EOS 70D (which is great for video) will capture the sound of the scene without the noise of the focusing motors!
I aways convert the focal length for lenses I use on APS-C to what would needed for the same result on a full frame camera. Here, 55-250mm becomes 88-400mm so you can see that the lens offers quite a high magnification over a standard 50mm lens.
The zoom lens has an impressive optical image stabilizer. Such that if your on the full telephoto of the 400mm equivalent you would normally be expecting a shutter speed of 1/400 but with the stabilizer 1/100 would do. This is a factor of 3.5 equivalent stops for shake correction.
Another feature of the EF-S 55-250mm is the UD lens element which reduces chromatic aberration throughout the zoom range giving claimed excellent image quality with high resolution and contrast. It also has a 7-blade circular aperture that creates beautiful, soft backgrounds. Minimum focusing distance is 2.79 ft./0.85m.
For more information about the EF-S 55-250mm f/4-5.6 IS STM telephoto zoom lens, visit www.usa.canon.com/cusa/consumer/products/cameras/ef_lens_lineup.