Canon have launched a new high performance zoom lens - the EF24-70mm f/2.8L
USM. The EF24-70mm f/2.8L USM is the successor to the EF28-70mm f/2.8L USM and
offers a higher zoom range combined with a wider angle to ensure high image
The new EF24-70mm f/2.8L USM is ideally suited to advanced amateurs and professional
photographers and incorporates new design features as well as utilising Canon's
existing optical technology to provide perfect photographic results.
"The increase and popularity of professional digital cameras has necessitated
the development of a new lens", says Mark Robinson, Marketing Manager,
Canon Consumer Imaging, "Canon has introduced the EF24-70mm f/2.8L USM
lens to target the digital SLR user. The wider angle helps to compensate for
any focal length magnification through a digital SLR."
Zoom Lens Optical Features
The EF24-70mm f/2.8L USM uses two types of aspherical lenses to provide a wider
24-70mm zoom range. These two elements provide good compensation for aberrations
while zooming and maintain excellent image quality.
The optical construction of the EF24-70mm f/2.8L USM uses a UD (Ultra-low Dispersion)
lens that provides excellent compensation of the chromatic aberrations that
tend to occur in wide-angle shooting. The power of the focusing lens group has
been increased to allow a minimum focusing distance of 0.38metres throughout
the entire zoom range which currently is the shortest distance in its class.*
A new type of electromagnetic diaphragm (EMD) has a near-circular aperture
at the widest settings, which provides the user with an improved out-of-focus
All the elements are made from environmentally friendly lead-free glass.
The lens mount, switch panel, zoom ring and focusing ring in the EF24-70mm
f/2.8L USM have been outfitted for water and dust resistance making the lens
ideally suited for harsh environments. Additionally, optimised lens coatings
in the EF24-70mm f/2.8L USM minimises ghosting.
The EF24-70mm f/2.8L USM also provides users with a silent and high-speed AF
operation with rear focusing and ring USM and manual focusing remains enabled
even in the AF mode.
Various accessories can be attached to the front of the EF24-70mm f/2.8L USM
without being hindered by lens rotation or movement.