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Sony A7R IV: Diffraction with High Grade Lenses

This page discusses considerations for diffraction on the Sony A7R IV, which has 3.74 micron photosites—extremely small.

The effects of diffraction will be vary depending on optical performance: a mediocre lens has less to lose, the wavelength of light involved (blue resolves much better than red and is thus affected more quickly). Subject matter interacts with it all, particularly in terms of textural detail on relatively low contrast subject matter. Diffraction mitigating sharpening can help, but never improves tonality and at some point can never 'get it back'.

Diffraction Considerations for Sony A7R IV

Includes discussion of a series from f/2 through f/8.

f4 @ 1/200 sec pixel shift, ISO 100; 2019-09-14 18:23:18
Sony A7R IV + Voigtlander FE Macro APO-Lanthar 65mm f/2 Aspherical
RAW: LACA corrected, vignetting corrected, USM {5,50,0}

[low-res image for bot]
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