Sigma DG 20-40mm f/2.8 EX Aspherical is a fast autofocus zoom lens for SLR cameras.
The optical scheme comprises 17 elements in 13 groups. Thanks to minimum aperture ratio of f/2.8 enables shooting in low lighting conditions without a tripod or a flash. Thanks to the 9-bladed aperture, the subjects located outside the depth of field are shown with very smooth features.
This lens has a size of 108 mm. This is a normal size, very convenient in everyday use. This lens weighs 595 grams, given the weight of the camera, it may deliver long wearing problems. The lens is suitable for shooting near objects. Is useful for landscape, architecture, interior and genre photography. Lens fit for low light conditions. Sigma DG 20-40mm f/2.8 EX Aspherical went on sale in 2001.
May be available from: Amazon.com, Amazon.co.uk, eBay.com, eBay.co.uk.
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