Zoom lens comparison: Tamron 17-50 f2.8 VC, Sigma 17-50 f2.8 OS / 18-35 f1.8, Canon 17-55 IS USM - YouTube
Canon EF-S 17-55/2.8 IS USM and Sigma 17-50/2.8 EX DC OS HSM Review - Bob Atkins Photography
SIGMA 17-50 vs KIT 18-55 - YouTube
HELP: aps-c sensor (canon 77D) Best lens? 1) canon 17-55 f/2.8. 2) sigma 18-35 f-1.8. 3) sigma 17-50 f/2.8. 4) your choice in this range of zoom. Use for edc/ wedding/ portrait : r/canon
Sigma 17-50mm f2.8 vs Canon 17-55mm f2.8 and Tamron 17-50mm f2.8 | Darwin Wiggett