see also:

• Canon EF lenses
• Sigma 12-24mm f/4 DG HSM Art full frame lens
• Sigma 24mm f/1.4 DG HSM Art full frame lens
• Sigma 24-35mm f/2 DG HSM Art full frame lens
• Sigma 35mm f/1.4 DG HSM Art full frame lens
• Sigma 50mm f/1.4 DG HSM Art full frame lens
• Sigma 50-100mm f/1.8 DG HSM Art APS-C/DX lens
• Sigma 85mm f/1.4 DG HSM Art full frame lens

• 18-35mm f/1.8 APS-C/DX AF lens in various mounts (Canon EF, Nikon F, Sigma SA, Pentax K and Sony Alpha )
• announced in 2013

• 18-35mm f/1.8 APS-C/DX AF lens

• http://www.kenrockwell.com/sigma/18-35mm-f18.htm
• https://www.dpreview.com/reviews/sigma-18-35-1-8
• http://www.imaging-resource.com/lenses/sigma/18-35mm-f1.8-dc-hsm-a/review/
• http://www.photozone.de/canon-eos/872-sigma1835f18_canon
• https://www.ephotozine.com/article/sigma-18-35mm-f-1-8-dc-hsm-a-lens-review-22257