This 50-500mm f/4.5-6.3 APO DG OS HSM Lens for Sony/Minolta from Sigma is
a zoom lens for digital SLR cameras with a Sony/Minolta 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.
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.
filter size of this lens is 95mm and the lens is supplied with a step
down ring enabling digital cameras with an APS-C size image sensor to
use an 86mm filter.
Note: It is not possible
to use a polarizing filter with the step down ring. If you attach a
polarizing filter, you may not be able to remove it from the lens again.
Note: It is not possible to use the AF and the built-in OS function of this lens when attaching it to film SLR cameras