Fast Sigma ultra-wide zoom for Canon EF with constant f/2.8 from 20mm, excellent for astro and interior work.
The Sigma 20-40mm f/2.8 EX DG is a full-frame wide-angle zoom for the Canon EF mount from Sigma's EX premium line. DG = full-frame coverage. Constant f/2.8 aperture. Canon EF mount.
f/2.8 constant aperture. 20-40mm zoom (full-frame). EX premium build quality. DG (full-frame). AF. At approximately 620g. Canon EF mount.
The Sigma 20-40mm f/2.8 EX DG provides a wide-to-standard zoom range at constant f/2.8 for full-frame Canon cameras — useful for wide-angle photography in lower light. The EX build quality is above standard Sigma.
On the used market the Sigma 20-40mm f/2.8 EX DG is a capable vintage wide zoom for Canon EF. Condition checks: AF operation, front element, zoom ring. Canon EF mount.