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Comparing Sony A7R IV to Sony A7R III Resolution on a Siemens Chart

This page sets looks at an idealized target (Siemens chart), which can demonstrate the best possible sharpness unambiguously. It presents findings which are definitive as to the peak potential of both cameras under ideal conditions.

There is a much to be learned here, and from f/2 to f/11 for both cameras:

Shootout of Sony A7R IV vs Sony A7R III: Siemens Chart

Includes images from f/2 through f/11 at up to full camera resolution, shot in pixel shift, single frame with Enhance Details and without.

f4 @ 0.3 sec pixel shift, ISO 100; 2019-09-21 09:03:02
Sony A7R IV + Voigtlander FE Macro APO-Lanthar 65mm f/2 Aspherical @ 97mm equiv (65mm) RAW: LACA corrected, vignetting corrected

[low-res image for bot]

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