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Upgrade the memory of your 2020 iMac up to 128GB

3-Way Shootout: Sony 16-35mm f/2.8 GM vs Sony 12-24mm f/4 G vs Sigma 14-24mm f/2.8 DG DN Art @ 24mm: Mosaic (Sony A7R IV)

This series compares the Sigma 14-24mm f/2.8 DG DN Art at 24mm against the Sony 16-35mm f/2.8 GM and Sony 12-24mm f/4 G from f/2.8 through f/8 on an extremely demanding target: a planar subject with exceedingly fine detail. This target is among the most demanding any lens can face, inexorably showing most all lens weaknesses.

Field curvature is of particular interest because at 60MP, small deviations across the field are not so small, and stopping down past f/4 begins to degrade micro contrast from diffraction. Focus shift, even small, can also be a challenge.

Also of interest is lens symmetry, which is relatively challenging on a 60MP sensor, which mercilessly shows the slightest flaw. However, lacking stated specifications from Sony, there is no way to be certain that any particular lens skew is the fault of the lens, or the sensor/flange parallelism being off a few microns.

3-Way Shootout: Sony 16-35mm f/2.8 GM vs Sony 12-24mm f/4 G vs Sigma 14-24mm f/2.8 DG DN Art @ 24mm: Mosaic (Sony A7R IV)

Includes images from f/2.8 to f/8 at up to full camera resolution.

CLICK TO VIEW: 24mm Options for Sony Mirrorless

  
Sigma 14-24mm f/2.8 DG DN Art, Sony 16-35mm f/2.8 GM, Sony 12-24mm f/4 G (not to scale)
f5.6 @ 1/25 sec pixel shift, ISO 100; 2019-09-14 18:51:42
Sony A7R IV + Sigma FE 14-24mm f/2.8 DG DN Art @ 24mm
RAW: LACA corrected, vignetting corrected, USM {8,50,0}

[low-res image for bot]
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Nikon Z 7 Mirrorless Digital Camera with 24-70mm Lens (Refurbished)
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