Canon EF-S 18–135mm lens
Introduction The '''Canon EF-S 18–135mm lens''' is a standard to short telephoto telezoom for Canon digital single-lens reflex cameras with an EF-S lens mount. The field of view has a 35 mm equivalent focal length of 29–216mm. With its 7.5× zoom range, it is placed into the superzoom category. Canon offers further lenses with even higher zoom ranges, such as the EF-S 18–200mm lens (11× zoom range).
Canon EF-S 18–135mm f/3.5–5.6 IS The original version of the lens, the f/3.5–5.6 IS, was introduced in 2009 with a suggested retail price of US$499.99.It is the standard kit lens for the Canon EOS 60D and EOS 7D, and is an alternative kit lens in some markets for the EOS 600D/Rebel T3i.
Canon EF-S 18–135mm f/3.5–5.6 IS STM A new version of the lens, the f/3.5–5.6 IS STM, was announced on 8 June 2012, alongside the EOS 650D/Rebel T4i/Kiss X6i. The "STM" stands for "Stepping Motor", a new autofocus technology claimed by Canon "to smoothly and silently focus" and "achieve continuous AF while recording video" when used with the 650D (and presumably future Canon bodies). Its suggested retail price was US$549.99 at introduction. It was an alternative kit lens for the 650D, and is now an alternative kit lens for the 650D's successor, the EOS 700D/Rebel T5i.This STM version, in some markets, is available as a kit lens for the Canon EOS 70D, as is also the Canon EF-S 18–55mm lens in its STM version.
Canon EF-S 18–135mm f/3.5–5.6 IS USM The latest addition of the 18–135 series is the EF-S f/3.5-5.6 IS USM, announced on 17 February 2016.New features are the new Nano USM and the possibility to connect the Power Zoom Adapter PZ-E1, which allows a soft zoom for video. The lens is also available as bundle with the Canon EOS 77D and 80D, which was announced same date.
Specifications  Attribute  f/3.5–5.6 IS  f/3.5–5.6 IS STM  f/3.5–5.6 IS USM Image200px200x200pxKey features Full-frame compatible Image stabilizer Environmental sealing Ultrasonic Motor  Stepping Motor    L-series Diffractive Optics Macro Zoom Lock Lever Technical data Maximum Aperture f/3.5-5.6 Minimum Aperture f/22-38 Construction 12 groups / 16 elements # of diaphragm blades 6 7 Closest focusing distance   Max. magnification 0.21× 0.28× Horizontal viewing angle 64°30'–9°30' Diagonal viewing angle 74°20'–11°30' Vertical viewing angle 45°30'–6°20'Physical data Weight    Maximum diameter 75.4 mm (3.0") 77 mm (3.0") 77.4 mm (3.1") Length 101 mm (4.0") 96 mm (3.8") Filter diameter 67mmAccessories Lens hood EW-73B EW-73DRetail information Release date September 2009 June 2012 March 2016 Currently in production? MSRP US$$499.00$549.00$599.00
References
External links * Canon EF-S 18–135mm – Canon UK* Canon EF-S 18–135mm – Canon USA * Press Release – Digital Photography Review