This test is of a landscape scenario at mid-range focus. The mid-day lighting was a good time of day to put aside creative photography and make a comparison under harsh but reasonably consistent lighting.
The scene was chosen to provide a near/far perspective, to show off any field curvature issues. With crappy focusing mechanics as well as aberrations, matching focus perfectly is a difficult task, so a near/far scene helps show off variations.
I shot another scene elsewhere on a different day elsewhere, with similar results.
Focus was just above center near a small white patch of snow.
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