G*******g 发帖数: 3729 | | w****g 发帖数: 727 | 2 seems version 1, price too high | G*******g 发帖数: 3729 | 3 新版本
The Sigma 120-300mm f/2.8 DG OS HSM Lens for Canon is a telephoto zoom lens
featuring a fast, constant f/2.8 maximum aperture. This lens is the first
lens designed under Sigma's new Sports line of lenses, making it well-suited
for fast-moving subjects such as wildlife, nature, aviation, racing, and
other similar situations.
Featuring a dust- and splash-proof construction, this lens is ideally-suited
for use in outdoor and adverse conditions. Its design features rubber focus
and zoom rings as well as conveniently located mode switches to enhance
usability with the lens. A built-in Optical Stabilizer provides a four-stop-
equivalent reduction in the appearance of camera shake, helping to enable
better handheld usage and low-light shooting. The Hyper Sonic AF Motor
provides fast, smooth, and quiet auto focusing for faster performance that
also benefits video recording.
This lens is also compatible with the Sigma USB Dock, which allows you to
use the Sigma Pro Optimization software to fine-tune certain lens settings
to your own shooting needs. The ability to limit focus range, alter the AF
speed, and modify the OS system is afforded through this, as well as the
ability to easily update the lens' firmware.
Sports Lens Line
This lens is the first lens produced as part of Sigma's Sports line, making
it ideally-suited for capturing fast-moving action with high precision. Its
telephoto-length zoom range and fast maximum aperture make it especially
useful for sports photography as well as wildlife, birding, and other fast-
paced applications. Also benefitting these shooting scenarios is a wide
range of customizable functions availed through the use of the Sigma USB
Dock.
Optimized Lens Design
Well-suited to outdoor photography, a dust- and splash-proof construction
enables use of this lens in adverse conditions. Joint parts, such as the
mount, focus and zoom rings, and switches, are sealed to provide this
resistance and improve overall durability. Parts of the lens have also been
optimally designed for more comfortable use, including textured rings and
well-placed switches for more efficient operation. A brass bayonet mount is
also used to increase the durability at this connection point, giving more
strength and rigidity between the camera and lens system.
The lens construction integrates two FLD (F Low Dispersion) glass elements
and one SLD (Super Low Dispersion) glass element to help reduce color
aberrations and sagittal coma flare to improve overall image quality. Lens
elements also feature a Super Multi-Layer Coating to reduce flare and
ghosting, which helps to improve image contrast and color fidelity
throughout the zoom range.
USB Dock Compatible
This lens is compatible with the Sigma USB Dock for fine-tuning and
personalizing certain functions of the lens to fit your personal shooting
style. A focus limiter can be set to constrain your lens' focusing distances
to suit the distances at which you are shooting. Additionally, this lens
features an inner focusing and zooming configuration so the physical length
of your lens does not change during use; which greatly benefits the use of
certain filters such as a polarizer.
The USB Dock also allows you to customize the speed at which the autofocus
system performs, how active the Optical Stabilizer system is during shooting
, and allows you to easily update the lens' firmware.
【在 w****g 的大作中提到】 : seems version 1, price too high
| w****g 发帖数: 727 | 4 o,
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【在 G*******g 的大作中提到】 : 新版本 : The Sigma 120-300mm f/2.8 DG OS HSM Lens for Canon is a telephoto zoom lens : featuring a fast, constant f/2.8 maximum aperture. This lens is the first : lens designed under Sigma's new Sports line of lenses, making it well-suited : for fast-moving subjects such as wildlife, nature, aviation, racing, and : other similar situations. : Featuring a dust- and splash-proof construction, this lens is ideally-suited : for use in outdoor and adverse conditions. Its design features rubber focus : and zoom rings as well as conveniently located mode switches to enhance : usability with the lens. A built-in Optical Stabilizer provides a four-stop-
| S******n 发帖数: 5022 | 5 from HK, 万一用fedex/ups, 要报税就亏大了 | D**1 发帖数: 1106 | 6 是所有的都要报? 相机镜头啥税率?
【在 S******n 的大作中提到】 : from HK, 万一用fedex/ups, 要报税就亏大了
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