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Distortion Uncorrected vs Corrected
Distortion is a given with a wide angle lens; it is only a matter of the degree.
While the Zeiss 35mm f/2 Sonnar on the Sony RX1R II has low distortion, it is not low enough for some types of shooting: horizons, architecture, possibly even groups of people in a regular order.
The distortion of the 35/2. Sonnar is moderate barrel distortion.
See also the distortion example for the Sony RX1/RX1R for another example.
Ocean horizon example
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