For more information on Sigma's zoom and fixed focal length lenses, have a look at Sigma's lens FAQs.
The information in the Optical data section applies to the use of the lens with regular 35mm SLR cameras. For digital SLR cameras the View Angle and the 35mm Focal Length equivalent can be found with the help of this calculator
In the Digital data section you will find the Focal Length column marked with 0 as the focal length on digital cameras is dependent on the size of the image sensor and thus differs per cameras type.
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The price specified in the last column is just an indicative price in US dollars, click the price to find the best deals in the selected currency.
Note: As the perceived focal length and the angle of view varies for digital cameras, the zoom lens classification is (arbitrary) done based on the mid-point of the 35mm focus specifications of the lens, i.e. wide angle lenses below 45, standard lenses from 45 to 90, and telephoto lenses above 90.
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