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EXCERPT page containing first few paragraphs. 2023-03-25 13:14:57

Leica 50mm f/1.4 Summilux-SL ASPH

Sharpness Losses from Field Curvature at Distance: Grassy Meadow

This aperture series from f/1.4 through f/5.6 looks at the pronounced field curvature of the Leica 50mm f/1.4 Summilux-SL ASPH, showing why the lens is a poor choice for landscape work at a distance, as with this scene.

A lens that cannot render sharpness across the frame even at f/5.6 means that it has no versatility, and cannot be relied upon to perform for any image where sharpness must cover the frame, or for any planar subject, or for astrophotography. This series proves that the Leica 50mm f/1.4 Summilux-SL ASPH is just such a lens.

Grassy meadow

Adobe Camera Raw View ACR Settings. Camera Profile = Adobe Color. ACR-enforced lens corrections for distortion and lateral chromatic aberration.

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  • 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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Aperture series 1.4,2,2.8,4,5.6 available in full article

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