Size comparaons between the Canon EF 24-70mm f/2.8L USM and the EF 24-105mm f/4L IS USM with the zoom barrels fully retracted (70mm for the 24-70 and 24mm for the 24-105) and hoods attached. Note EW 83F hood on the 24-70 is covered with gaffer tape, and normally would be smooth plastic similar to the hood on the 24-105.
L-Series standard zoom lens delivers superb image quality in a compact, lightweight design. Extremely versatile professional grade zoom lens with full 35mm frame coverage. Zoom range includes moderately wide angle, normal, and portrait focal lengths. 2 Aspheric and 2 UD lens elements for high image quality throughout the entire zoom range.
Canon calls this the Canon EF 70-200mm f/4L IS II USM. EF: Electronic Focus, as all Canon's lenses have been since 1987. L: Expensive as L. IS: Image Stabilization. II: Canon's second version of this lens. USM: Ultrasonic Autofocus Motor. Optics. Canon EF 70-200mm f/4L IS II internal construction. Fluorite and UD elements. This is an in-depth review of the Canon EF 200-400mm f/4L IS USM with a built-in 1.4x extender, a telephoto zoom lens targeted at enthusiast and professional action photographers. For many years, Canon users shooting serious wildlife and sports photography had come to accept that the only telephoto lenses on offer by Canon that achieved the top
Say what you might, the launch of the Canon EF 24–70 mm f/4L IS USM was a huge surprise. The EF 24-105 f/4L IS USM model has been available on the market for some years at that time and it enjoyed a very favourable opinion so presenting an instrument with a narrower focal range and a significantly higher price tag seemed rather counterproductive.
The 24-70 f/4L IS's image sharpness is difficult to summarize in a single sentence or two. Therefore, I'm going to pull from Bryan's review for a detailed description: With a wide open f/4 aperture: At 24mm, the Canon EF 24-70mm f/4L IS USM Lens is very sharp in the center with good sharpness extending to the periphery of the full frame image TKrp.
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    • canon ef 24 70 f 4l is usm review