Sigma DG 500mm f/4.5 EX APO HSM is a autofocus prime lens with ultra-sonic motor for SLR cameras.
The optical scheme comprises 11 elements in 8 groups. Thanks to the 9-bladed aperture, the subjects located outside the depth of field are shown with very smooth features. Equipped with a silent ultrasonic motor providing fast and quiet autofocusing.
This lens has a size of 350 mm. The lens of this size it is difficult to carry. This lens weighs 3100 grams, given the weight of the camera, it may deliver long wearing problems. Minimum focusing distance 4 m is only for shooting distant objects. Sigma DG 500mm f/4.5 EX APO HSM went on sale in 2005.
May be available from: Amazon.com, Amazon.co.uk, eBay.com, eBay.co.uk.
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