Sigma's compact f/2.8 standard zoom for mirrorless — Contemporary line at 28-70mm for Sony FE and L-Mount.
The Sigma 28-70mm f/2.8 DG DN Contemporary launched in 2021 as a compact constant f/2.8 zoom for mirrorless, smaller and lighter than the Art-line 24-70mm f/2.8 DG DN. The Contemporary designation prioritises portability at very competitive pricing.
Optically very good — sharp throughout with constant f/2.8. Not quite Art-line quality in the corners but excellent for the compact size. Stepping motor AF is fast and quiet. Good close focus at 19cm at 28mm. Designed for portability-conscious photographers.
Available for Sony FE and L-Mount. 67mm filter thread. Approximately 470g — significantly lighter than the Art 24-70mm f/2.8 at 830g. Dust and splash resistant. Internal zoom. Minimum focus distance 19cm at 28mm.
Available used at mid-range prices. The compact size and competitive price are the main attractions vs the Art 24-70mm. The 28mm starting point (vs 24mm) is the optical compromise. For mirrorless shooters wanting f/2.8 standard zoom without the Art-line bulk.