Nikon AF-S Nikkor 180-400mm f/4E TC1.4 FL ED VR Review
Sharpness at 180mm
The sharpness tests for this review were carried out using a real-world subject rather than a test chart. The Nikon AF-S Nikkor 180-400mm f/4E TC1.4 FL ED VR lens was attached to a Nikon D850 body, which in turn was mounted on a sturdy tripod. We also used a release cable and mirror lock-up to prevent any blurring that may result from camera or mirror movement.
The full frame at 180mm
Centre sharpness is very good at f/4, and reaches outstanding levels at f/8. The edges are very slightly blurred at f/4 but sharpen up nicely upon stopping down to f/5.6, and peak sharpness is again achieved at f/8.
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