This 50-500mm f/4.5-6.3 APO DG OS HSM Lensfor Canon EOS from Sigma
is a zoom lens for digital SLR cameras with a Canon EF or EF-S lens
mount. The lens has a standard to ultra telephoto zoom range that is
ideal for nature, wildlife, or sports photography. The range translates
into an equivalent 75-750mm when used with digital SLR cameras with an
APS size chip. The lens is also compatible with full frame cameras. You
can even increase your telephoto range by using the Sigma APO
teleconverters.
The OS (Optical Stabilizer) system
minimizes image blur caused by camera shake, and offers the equivalent
of shooting at a shutter speed 3-4 stops faster. This allows handheld
telephoto zoom shooting even in poorly lit conditions.
The use
of the OS (Optical Stabilizer) system, HSM (Hyper Sonic Motor), APO
apochromatic design, four elements of SLD (Special Low Dispersion)
glass, and multicoated optics all enable this lens to provide a high
level of performance throughout its entire zoom range. A rear focus
system insures quick, convenient manual focus and a non-rotating front
barrel.
The improved DG lens design corrects for various
aberrations. This lens is specially coated to get the best color
balance, while cutting down on ghosting caused by reflections from the
digital image sensor. The lens provides the utmost correction against
lateral chromatic aberration, which is a serious problem for digital SLR
cameras.
Note:
If the camera body does not support the HSM motor, auto focus will not work.
Designed for use with full frame digital SLR cameras. May
also be used with smaller APS-C size sensors with a corresponding
effective increase in focal length to about 75 to 750mm with most
camerasStandard to ultra telephoto zoom range makes this the perfect to carry when you only have room for one lens.The OS system uses two sensors inside the lens to detect
vertical and horizontal
movement of the camera. It works by moving an optical image stabilizing
lens group, to effectively compensate for camera shake. It automatically
detects movement of the camera and compensates for camera shake when
shooting a moving subject such as motor sports.The HSM (Hyper Sonic Motor) system ensures quiet and high-speed auto focusing with full time manual focus override.Four Special Low Dispersion (SLD) elements provide excellent correction for chromatic aberration.The improved DG lens design corrects for various aberrations.Super Multi Layer (SML) coating reduces ghost and flare.