Sigma 884306 Camera Lens User Manual


 
[Special Features]
1. Contemporary line can handle all sorts of photo opportunities
Sigma is organizing all its interchangeable lenses into three product lines; Contemporary, Art and
Sports. Featuring the very latest technology, and combining optical performance with compactness,
the Contemporary line covers a wide range of needs. Incorporating the very latest technology in these
lenses, Sigma has solved the difficult problem of keeping size and weight low without compromising
optical performance.
The SIGMA 17-70mm F2.8-4 DC MACRO OS HSM is the first product from the
Contemporary line. Featuring a wide zoom range, the lens has a focal range equivalent to 25.5-105mm
on a 35mm lens.
2. Excellent for macro photography
This lens’ minimum focusing distance is 22cm and the maximum magnification ratio is 1:2.8. At 70mm,
the working distance becomes 5.52cm. When it comes to telephoto, it can shoot pictures with a similar
sensation to a macro lens. Also, without the need to change the lens, it enables photographers to take
a close up pictures of subjects such as jewelry and flowers. In order to secure a clear field of view, the
design of this lens is very thorough, even down to the precise position of the engraved letters on the
lens.
3. 30% Smaller Than Conventional Models
For a which is used lens used in everyday situations, the small size makes a big difference. By
incorporating a smaller OS unit and optimizing the structure and power distribution of optical
elements, the lens barrel has now become more compact. In order to ensure high accuracy of the
product, the new compound material TSC (Thermally Stable Composite), which has high affinity to
metal parts, is introduced for the lens barrel. It results in better durability of the parts and smaller
zoom rings and scale rings. The dimension of this lens is 30% smaller than our conventional models.
4. Superior Image Quality Throughout The Entire Zoom Range
This lens incorporates 2 FLD (“F” Low Dispersion) glass elements, which have performance equal to
fluorite, 1 SLD (Special Low Dispersion) glass element and 3 aspherical glass lenses including double
sided aspherical lens. By optimizing the power alignment of the lens, both chromatic aberration of