Sigma announce APO 300-800mm F5.6 EX DG HSM lens. This digitally optimized lens covers the ultra-telephoto range up to 800mm and has a fast maximum aperture. Its new lens coating reduces flare and ...
" This lens covers the telephoto range from 300mm to the ultra-telephoto range up to 800mm. By continuously varying the angle of view from 8.2º to 3.1º, the lens takes a lot of the footwork out of ...
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