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42MP Sony A7R III
60MP Sony A7R IV

Shootout of Sony A7R IV vs Sony A7R III: View Past Greenstone Lake to North Peak

This field comparison between the Sony A7R IV and Sony A7R III uses the Sigma 35mm f/1.2 DG DN Art, which when focused optimally, is one of the sharpest lenses available for Sony.

However, the Sigma 35/1.2 here has pronounced field curvature (see shootout vs Zeiss Loxia 35/2). Some weeks after writing this and following discussion with other knowledgeable people, I have concluded that this is NOT a bad sample, but actually a quite good sample, with typical behavior for the design. In particular, the lens used here shows very good symmetry which is highly unlikely if anything is off kilter.

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Diglloyd Guide to Mirrorless offers comprehensive integrated coverage of most APS-C and full frame mirrorless cameras and lenses.

Special emphasis is placed on Sony full-frame, including Sony lenses and the high performance Zeiss Batis and Zeiss Loxia lenses plus Rokinon/Samyang and others. Fujifilm X, Olympus and Panasonic M4/3, Sigma dp Merrill and dp/sd Quattro are also covered in depth. Years in the making, it offers a wealth of material for choosing and using a mirrorless camera.

  • Make better images by learning how to get the best results right away. For example, the best way to set up your Sony camera.
  • Save money by choosing the right lens for your needs the first time, particularly with the numerous lenses available for Sony.
  • Make better images, a sort of “cheat sheet” saving yourself months or years of ad-hoc learning—best practices and how-to and processing parameters are discussed and shown.
  • Jaw-dropping image quality found nowhere else utilizing Retina-grade images up to full camera resolution, plus large crops.
  • Real world examples with insights found nowhere else. Make sharper images just by understanding lens behavior you won’t read about elsewhere.
  • Aperture series from wide open through stopped down, showing the full range of lens performance and bokeh.
  • Optical quality analysis of field curvature, focus shift, sharpness, flare, distortion, and performance in the field.

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Sony A7R IV

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