Sigma's compact 50mm macro — 1:1 at f/2.8 with EX build quality for DSLR mounts.
The Sigma 50mm f/2.8 EX DG Macro is a compact macro prime providing true 1:1 life-size magnification at 50mm focal length. The shorter focal length means closer working distance than 100-105mm macros but in a much more compact package.
Optically good — sharp at macro distances with the EX designation indicating professional construction. The 50mm focal length provides less working distance at 1:1 than longer macros — the lens is very close to the subject. Also functions as a general 50mm prime.
Available for multiple DSLR mounts. 55mm filter thread. Approximately 320g — compact. No stabilisation. Full-frame coverage. EX build quality. Minimum focus distance approximately 19cm at 1:1.
Available used very cheaply. The short working distance at 1:1 limits use for insect photography — better for flat subjects and product work. The Sigma 70mm f/2.8 DG Macro Art is a more modern option. For budget macro work where the close working distance is acceptable.