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Sony / Zeiss FE 24-70mm f/4 OSS Vario-Tessar

Distortion and Color Fringing @ 70mm

Shown for comparison are Adobe Camera Raw (ACR) with corrections “off”*, and Iridient Developer with distortion correction enabled (but no other corrections). This is the same original raw ARW file; the differences are strictly from the raw converters.

* Adobe Camera Raw auto-corrects color fringing with A7 files and there is NO WAY TO DISABLE IT (see settings at end of this page). The correction is performed regardless of camera settings, e.g., whether Chro. Aber. Comp = Auto or Off (tested by shooting the same frame with it enabled and disabled).

The uncorrected image from ACR shows strong pincushion distortion, probably something on the order of 2.5% to 3%. Placing a line across the ruler in Photoshop shows a slight undercorrection from Iridient Developer (a residual pincushion distortion). This is not surprising for a zoom lens; presumably the exact behavior is not necessarily known precisely for every focal length in the zoom range.

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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.

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  • Optical quality analysis of field curvature, focus shift, sharpness, flare, distortion, and performance in the field.

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Variants uncorrected, corrected available in full article

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