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EXCERPT page containing first few paragraphs. 2023-03-21 16:17:30

Leica 50mm f/0.95 Noctilux-M

Field Curvature: 50/0.95 Noctilux-M ASPH

The 50mm f/0.95 Noctilux-M ASPH has very substantial field curvature at close range in particular, and it lingers at medium and far distance.

Examples here show the arc of field curvature which can work to useful purposes for sharpness with some subject matter, or can degrade sharpness: it all depends on the subject matter.

Close range

Field curvature is visible here as an arc of sharpness that extends from center towards the corners.

Observe that if one were to evaluate sharpness across the frame, the edges are blurry: “poor performance”. While the edges do decline in sharpness, they actually are reasonably sharp, but further back (greater distance).

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Diglloyd Guide to LEICA contains in-depth coverage of Leica M system cameras and lenses, with additional coverage of Leica M Monochrom, Leica Q.

Special emphasis is placed on Leica M lenses and certain Zeiss ZM lenses.

  • Make better images by learning how to get the best results right away.
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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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Leica M9 + Leica 50/0.95 @ f/0.95, 1/1000 sec handheld, ISO 80

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