The Sigma 17-70 OS is a new version of the Sigma 17-70mm. It has been designed for different DSLR cameras and those photographers who are looking to enjoy the benefits of an extra zoom and extra apertures. This new version will provide the elements that were absent in the older version, including the OS and HSM motor.
The buyers will enjoy the F2.8 aperture of Sigma 17-70 OS because it can be used in different situations such as macro, portraits, general photography as well as sports. The aperture has also made it possible for the users to engage in hand held photography throughout the zoom range and at high auto focus speed. Those who love close up photography will also benefit from Sigma 17-70 OS because of the focusing distance that comes with a minimum of 22cm and a maximum magnification 1:2:7 ratios.
The Optical Stabilizer (OS) function provides users with shutter speeds that are almost 4 stops slower than would usually possible. The Sigma 17-70 OS also comes with three aspherical lenses and a single Extraordinary Low Dispersion (ELD) glass element that will provide corrections to different types of aberrations. This assures the users of high quality image all through the zoom range.
Just like other types of lenses from Sigma, Sigma 17-70 OS comes with a super multi layer coating that will decrease ghosting and flare, and at the same time offer images with high contrast. Apart from that, it comes with HSM, which will ensure a high speed and quiet Auto focus. The outstanding thing in this lens is the rounded 7 blade diaphragm, which causes an attractive blur to the image areas that are out of focus.
When it comes to vignetting, the buyers of the Sigma 17-70 OS will experience some of at the widest apertures. In order to avoid this, they need to get down one stop at the every focal length. Chromatic aberration is well controlled and the users can ignore the focal length and apertures. Users will also enjoy a smooth operation when it comes to manual focusing. The focus ring will rotate during autofocus. The polarizing filter will not be a problem because the front lens will not rotate.
When it comes to the build, this lens is decent and better to handle. It is good for different types of situations because of the fast and silent autofocus as well as the great OS performance of the Sigma 17-70 OS.
The buyers will enjoy the F2.8 aperture of Sigma 17-70 OS because it can be used in different situations such as macro, portraits, general photography as well as sports. The aperture has also made it possible for the users to engage in hand held photography throughout the zoom range and at high auto focus speed. Those who love close up photography will also benefit from Sigma 17-70 OS because of the focusing distance that comes with a minimum of 22cm and a maximum magnification 1:2:7 ratios.
The Optical Stabilizer (OS) function provides users with shutter speeds that are almost 4 stops slower than would usually possible. The Sigma 17-70 OS also comes with three aspherical lenses and a single Extraordinary Low Dispersion (ELD) glass element that will provide corrections to different types of aberrations. This assures the users of high quality image all through the zoom range.
Just like other types of lenses from Sigma, Sigma 17-70 OS comes with a super multi layer coating that will decrease ghosting and flare, and at the same time offer images with high contrast. Apart from that, it comes with HSM, which will ensure a high speed and quiet Auto focus. The outstanding thing in this lens is the rounded 7 blade diaphragm, which causes an attractive blur to the image areas that are out of focus.
When it comes to vignetting, the buyers of the Sigma 17-70 OS will experience some of at the widest apertures. In order to avoid this, they need to get down one stop at the every focal length. Chromatic aberration is well controlled and the users can ignore the focal length and apertures. Users will also enjoy a smooth operation when it comes to manual focusing. The focus ring will rotate during autofocus. The polarizing filter will not be a problem because the front lens will not rotate.
When it comes to the build, this lens is decent and better to handle. It is good for different types of situations because of the fast and silent autofocus as well as the great OS performance of the Sigma 17-70 OS.
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