The Canon EF 24-70mm f/2.8L II USM ($2,299) is the workhorse lens for many a Canon shooter. With a constant f/2.8 aperture throughout its zoom range, very good optical performance, and a fairly compact design, the lens pairs well with full-frame Canon cameras.

Announced in February 2012, the Canon 24-70mm ƒ/2.8L II USM is an update to its popular 24-70mm L-glass lens. The lens is completely redesigned, using a combination of UD and Super UD glass elements instead of aspherical elements.

Causing great excitement among Canon photographers was the February 7, 2011 development announcement of the Canon EF 200-400mm f/4 L IS USM Ext 1.4x Lens. I was personally excited - a Canon EF 200-400mm f/4 L IS USM Lens had long been on my most-wanted Canon lens list.

Quick review based on a production Canon EF 200-400mm f/4L IS USM Extender 1.4x. About a month ago Canon announced the EF 200-400mm f/4L IS USM Extender 1.4x - the world's first SLR lens with a built-in teleconverter. With the simple flick of a switch on the top of its barrel, the lens can be turned into a 280-560mm f/5.6 optic.

The Canon EF 70-200mm f/4 L USM Lens is arguably Canon's best value "L" Lens , combining professional grade build and optical qualities. Though solidly built, the 70-200 f/4 L is relatively light (25 oz / 705g).