Sigma BF Autofocus Technology Tested Against Panasonic S1 II for Wildlife and Sports Photography

Sigma BF's autofocus capabilities were evaluated against the Panasonic S1 II in demanding scenarios like wildlife and sports photography. The test involved mounting the Sigma 300-600mm f/4 DG OS Sports lens on both cameras. Jordan Drake participated with running tests, while a dog named Penny provided challenging wildlife tracking. Panasonic's S1 II features a sophisticated autofocus system with customizable settings, achieving consistent results with human subjects and handling erratic movement with some difficulty. Sigma BF's simpler setup impressed with single-point tracking reminiscent of Sony's Real-Time tracking, performing well with predictable movement but struggling with quick direction changes and reacquisition. Both cameras showed strengths: S1 II excelled in customization and consistency, while Sigma BF demonstrated potential despite limitations. Sigma's CEO has expressed interest in developing a professional-level body to leverage telephoto lenses, suggesting future improvements could enhance animal-detection algorithms and autofocus customization.