Sigma's budget telephoto for Sigma SA — the 70-300mm DL Macro Super for the Foveon system.
The Sigma 70-300mm f/4-5.6 DL Macro Super is a budget telephoto zoom from Sigma in the proprietary Sigma SA mount, designed for Sigma's own SA-mount DSLR cameras. DL indicates a consumer-grade lightweight build, and Macro Super refers to enhanced close-focus capability at the 300mm end.
The lens covers 70–300mm with a variable f/4–5.6 aperture, Sigma SA mount for Sigma's own camera bodies, consumer-grade DL build quality, and close-focus 'Macro' capability at the telephoto end. Full-frame coverage for Sigma SA full-frame bodies.
The Sigma SA mount is a proprietary system used only on Sigma's own DSLR cameras, which were produced in small numbers and are now discontinued. This limits the market for SA-mount lenses to photographers who specifically own Sigma SA-mount bodies. The DL Macro Super provides basic telephoto zoom coverage at budget price.
Verify SA-mount compatibility with the specific Sigma body model intended. Check autofocus operation for speed and accuracy. Inspect zoom ring for smooth travel. Examine internal elements for dust, haze, or fungal growth. Note that Sigma SA bodies are discontinued and support resources are very limited.