The Extender EF 2X III from Canon is
designed for select Canon EF mount L-series telephoto lenses. It
increases the focal length of a lens by a factor of 2x while still
delivering superb image quality. To ensure the best possible image
quality in all shooting conditions, it combines redesigned optics,
improved data communication between lens and camera and enhanced
environmental protection. It is ideal for photojournalists and wildlife,
nature and sports photographers who need to get close to distant and
challenging subjects and it reduces the need to carry heavy telephoto
lenses.
The Extender EF 2x III features nine optical elements
in five groups, ensuring improved optical performance. All optical
elements have Canon's Super Spectra coating to reduce ghosting and
flare. A new Fluorine Coating on the front and rear elements makes
marks, such as spots left by water or fingerprints, much easier to clean
than standard coatings.
To facilitate the accurate transfer of
imaging data between the lens and camera body, the extender features an
integrated processor which ensures all focusing, metering and ID
information is available - allowing the photographer to capture
balanced, well-exposed images. When combined with the latest range of
premium Canon L-series lenses, these extenders enable AF accuracy even
when capturing moving subjects. When attached, the 2x extender reduces the effective maximum aperture by 2 stops.
A
carefully positioned lens release mechanism also makes it easy to mount
the extenders quickly, reducing the time that the camera and lens are
exposed to the environment. The extenders offer the exceptional
build-quality expected from Canon's professional products, and are
resistant to both dust and water, allowing photographers to use them in
extreme shooting conditions.
Note: This converter
is only compatible with fixed focal length L-series lenses 135mm and
over, as well as the EF 70-200/2.8L, EF 70-200/2.8L IS, EF 70-200/4L,
and EF 100-400/4.5-5.6L. Additionally, please see the lens and/or camera
body manual for full autofocus compatibility information with the
Extender EF 2X III.