Product Description
Canon has announced the EF 28-300mm f3.5-5.6L IS USM ultra high magnification
zoom lens. With an approx. 11x zoom range covering everything from wide-angle to
telephoto, this latest dust and moisture proof white lens 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, allowing you
to shoot at slower shutter speeds without seeing any increase in the effects of
camera shake. This increases the range of circumstances in which hand-held
photography is possible, limiting the need to carry a tripod. With major
movement in a single direction, such as panning the camera, IS Mode 2
automatically determines that the movement is intentional and does not try to
overcome it. The system also automatically detects a lack of movement/vibration
in order to prevent over-correction when a tripod is used.
Fast Auto-Focus
The ring-type ultrasonic motor (USM) converts ultrasonic vibration energy into
rotational force to deliver high-speed, high-precision, super efficient and
virtually noiseless auto focusing. It offers good holding torque for rapid
response and 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.
Ideal for digital
The lens element design and coatings have been optimized to suppress ghosting
and flaring. This makes the lens ideal for use with digital cameras that are
more susceptible to reflections off the recording media than film cameras.
Precision optics for high image quality
22 lens elements in 16 groups offer low distortion and high corner-to-corner
resolution throughout the entire zoom range. As with all EF lenses, the aperture
is controlled by an EMD (electromagnetic diaphragm) for fast, quiet and precise
control. A circular aperture diaphragm is used to give attractive background
blur, from full aperture to two stops down. The use of three ultra-low
dispersion (UD) glass elements effectively reduces the residual chromatic
aberrations that can plague lesser quality long lenses. At the same time,
aspherical elements correct various kinds of aberration that occur during
zooming to give the lens the unsurpassed clarity and resolving power that are
expected from Canons professional L-series lenses.
Zoom Adjust
A zoom adjust mechanism allows sensitivity of the zoom movement to be adjusted
to suit personal preferences. The zoom can be locked at any focal length.
Environmental protection
The EF 28-300mm f/3.55.6L IS USM features a rugged dust and water resistant
construction, designed for professional photographers working in harsh
environments under a wide range of operating temperatures and humidity.
Working with EOS
The drive pattern of the lens is tailored to match that of the latest EOS camera
range, extracting maximum benefit from the speed advantage of the lens.
Environmental control
In keeping with Canons stringent environmental policy, only lead-free glass is
used in the optics.
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