The zone of sharp focus should be centered on the eye’s of the doll at left, which corresponds to the “14” mark on the ruler, ±2mm.
The Voigtlander Nokton 58mm f/1.4 SL II is impressive for its low level of focus shift, making it not only a lens with lovely bokeh, but one from which predictable results across the entire aperture range can be obtained without any fuss. While there is a noticeable focus shift from ƒ/2.8 - ƒ4, the amount is relatively small, and much less than the 50mm alternatives.
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