25mm Lens Vignetting, Chromatic Aberration and Distortion

Photographs were taken taken at infinity focus of an evenly illuminated white box with aperture wide open than at each full stop until f/8. Light drop off was measured with Imatest. Imatest Master was used to analyze SFRplus charts that were photographed to calculate distortion and chromatic aberration (CA).
Significant vignetting was found with the Voigtlander 25mm f/0.95 and the Panasonic 25mm f/1.4. Minimal distortion and chromatic aberration were detected.

Voigtlander 25mm f/0.95 @ f/0.95
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Panasonic 25mm f/1.4 Leica @ f/1.4
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  Vignetting        
F-stop Voigtlander Nokton 25mm f/0.95 Panasonic 25mm f/1.4 Leica DG Summilux Panasonic G X 12-35mm f/2.8 Panasonic 14-45mm f/3.5-5.6 Panasonic 20mm f/1.7
0.95 -2.41EV        
1.4 -1.35EV -1.94EV      
1.7         -1.50EV
2 -0.509EV -0.85EV     -1.11EV
2.8 -0.125EV -0.195EV -0.664EV   -0.666EV
4 -0.125EV -0.168EV -0.371EV   -0.421EV
4.9       -0.205EV  
5.6     -0.274EV -0.204EV -0.359EV
8     -0.28EV -0.043EV -0.382EV

 

  Distortion and Chromatic Aberration        
  Voigtlander Nokton 25mm f/0.95 Panasonic 25mm f/1.4 Leica DG Summilux Panasonic G X 12-35mm f/2.8 Panasonic 14-45mm f/3.5-5.6 Panasonic 20mm f/1.7
Distortion -0.999% barrel -0.131% barrel -0.13% pincushion -0.984% barrel -0.276% barrel
F-stop CA area % CA area % CA area % CA area % CA area %
0.95 0.0236        
1.4 0.0231 0.0150      
1.7         0.0241
2 0.0258 0.0095     0.0211
2.8 0.0282 0.0065 0.0176   0.0203
4 0.0291 0.0061 0.0161   0.0187
4.9       0.0269  
5.6 0.0315 0.0065 0.0120 0.0220 0.0173
8 0.0334 0.0082 0.0146 0.0169 0.0165