Sigma's fast ultra-wide for APS-C mirrorless — constant f/2.8 from 15-27mm equiv in compact design.
The Sigma 10-18mm f/2.8 DC DN Contemporary launched in 2023 as a fast ultra-wide zoom for APS-C mirrorless, covering 15-27mm equivalent with constant f/2.8 — the fastest APS-C ultra-wide zoom available. Contemporary line with compact design.
Optically very good — sharp across the frame with constant f/2.8 throughout the ultra-wide range. The f/2.8 is useful for astrophotography and low-light work — unusual for APS-C ultra-wides which are typically f/4 or slower. Stepping motor AF.
Available for Sony E and Fujifilm X mounts. 67mm filter thread — accepts standard filters, a major practical advantage. Approximately 260g — incredibly compact. Weather-sealed. Minimum focus distance 11.6cm at 10mm.
Available used at mid-range prices. The constant f/2.8 at ultra-wide on APS-C is unique — no other zoom offers this. The 67mm filter thread is practical for landscape ND and polariser use. For APS-C mirrorless shooters wanting fast ultra-wide with filter capability.