Canon raises the stakes for professional photography with its EF 28-300mm USM
ultra-high magnification zoom lens with image stabilization. This handy, compact
zoom lens offers versatility, easy subject selection, and the highest optical
performance in its class. The 11x zoom range covering everything from wide-angle
to telephoto, and you can focus in on subjects as close as 2.3 feet. A powerful
ring-type USM drive provides silent. Featuring a dust- and moisture-proof white
lens, it is designed to appeal to professional EOS photographers looking to reduce
lens changes and the number of lenses they need to carry.
Image Stabilization
The lens incorporates Canons Image Stabilization (IS) technology, compensating
for approximately three stops without any perceptible increase in image blur when
shooting static subjects or panning. This increases the range of circumstances
in which hand-held photography is possible, limiting the need to carry a tripod.
Fast Auto-Focus
The inner focusing ring-type ultrasonic motor (USM) converts ultrasonic vibrational
energy into rotational force to deliver high-speed, high-precision, super efficient
and virtually noiseless auto focusing, with good holding torque for rapid response,
accurate stopping. Full-time manual override without damage to the autofocus mechanism
is featured. Minimum focusing distance is just 0.7m throughout the entire zoom
range.
Ready for Digital Photography
The lens shape and coatings have been optimized to suppress ghosting
and flaring, making this lens ideal for use with digital cameras that are more
susceptible to reflections off the recording media than are film cameras.
Precision Optics
This lens features 22 elements in 16 groups for low distortion, high corner-to-corner
resolution throughout the entire zoom range. As with all EF lenses, aperture is
controlled with an EMD (electromagnetic diaphragm) for fast, quiet, highly precise
control and incorporates a circular aperture diaphragm for beautifully pleasing
background blur, from full aperture to two stops down.
The use of 3 Ultra-low Dispersion (UD) glass elements effectively curtails the residual chromatic aberrations that can plague lesser quality long lenses, while aspherical elements correct various kinds of aberration that occur during zooming to give the lens the unsurpassed clarity and resolving power that are the hallmark of professional L-series lenses.
Environmental protection
The EF 28-300mm f/3.5-5.6L IS USM features a rugged dust-proof and drip-proof
construction, designed for professional photographers working in harsh environments
under a wide range of operating temperatures and humidities.