See the dolls test scene on the previous page, which was a carefully controlled comparison matched to within ~1mm of accuracy in focus. It took most of a day to achieve comparison frames of equivalent precision, using a nodal slider in 1mm increments, and cross-checking with more than one attempt. Thus, the results seen here are as precisely matched and as fair as one could possibly hope to achieve. Yet presented with a “3D” subject offering far more informative view than a resolution target. No field comparison could be guaranteed to be as closely matched.
The sharpening evaluation here is based on the ƒ/6.7 frame, chosen carefully in examining a half-stop aperture series from ƒ/2.8 - ƒ/22. The ƒ/6.7 frame was chosen as offering the best blend of peak micro contrast and depth of field.
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