November 6th, 2015
Sigma presented SIGMA 10-20mm F3.5 EX DC HSM
The Sigma company announced release of a lens of SIGMA 10-20mm F3.5 EX DC HSM. He treats category of superwide-angle lenses with variable focal length and has the highest diaphragm of f/3,5 in all range of the focal.
Very wide corner of the review equal in the smallest provision of "zoom" 102,4 °, provides formation of being remembered pictures with typically underlined spatial prospect. The huge relative opening expands abilities of shooting in rooms and in other criteria of missing lighting.
The company refers existence of parts to features of a lens with «exclusively low dispersion» (Extraordinary Low Dispersion, ELD) and «especially low dispersion» (Special Low Dispersion, SLD), minimizing chromatic aberrations. Application of 4 asferichesky parts allowed to correct a distorsiya, having kept the small sizes and lens weight.
The lens is calculated on digital SLR cameras of the APS-C format and equipped with an ultrasonic drive of automatic focusing. Transition possibility in though what moment to manual focusing is provided. The internal mechanism of focusing excludes rotation of a face-to-face lens.
Specifications of a lens of Sigma 10-20mm F3.5 EX DC HSM:
- The optical scheme — 13 parts in 10 groups;
- Focal length — 10-20 mm;
- Review corner — 102,4 °-63,8 °;
- The greatest diaphragm — f/3,5;
- Small diaphragm — f/22;
- Small distance of focusing — 24 cm;
- The greatest increase — 1:6,6;
- Number of petals of a diaphragm — 7;
- Carving diameter for filter installation — 82 mm;
- The sizes — 87,3 x 88,2 mm.
Release of the options calculated on introduction with Sigma, Canon, Nikon, Sony and Pentax chambers is planned. The cover will enter into a set of delivery and petal бленда. The producer yet does not call cost and term of the beginning of sales.