Sigma 100-400mm F5-6.3 DG DN OS Review
Sharpness at 400mm
The sharpness tests for this review were carried out using a real-world subject rather than a test chart. The Sigma 100-400mm F5-6.3 DG DN OS lens was attached to a Sony A7 III camera body, which in turn was mounted on a sturdy tripod. Self-timer mode was activated. Slight tonal changes are due to slight changes in natural light during the session.
The full frame at 400mm
Centre sharpness is a little soft from f/6.3-f/8. Both the centre and the edge remain high through from f/11 to f/16, with f/22 to f/29 being adversely affected by diffraction.
|Aperture||Centre Crop||Edge Crop|