Sigma UC Zoom 70 – 210 mm 4-5.6 multi-coated manueller Fokus – Detailansicht sigma-mf-8 sigma-mf-0511 sigma-mf-10 sigma-mf-7 sigma-mf-13 sigma-mf-9 sigma-mf-0512 sigma-mf-11 sigma-mf-0513