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EXCERPT page containing first few paragraphs. 2023-02-03 04:02:54

Zeiss ZM 35mm f/1.4 Distagon

Field Curvature for Zeiss ZM 35/1.4 Distagon, Mirrorless Cameras vs M-Cameras

Field curvature of the Zeiss ZM 35/1.4 is exceptionally well controlled for a 35/1.4 lens, a much flatter field than either the Leica 35mm f/1.4 Summilux-M ASPH or Leica 35mm f/2 Summicron-M ASPH.

Still, there is a very mild curvature forward in the mid zones, then inflecting rearward from the long edge into the far corners. The corner inflection as well as the mid-zone “wave” are mirror images of the MTF chart behavior.

Toggle to see the accentuating (negative) effects of a 2.5mm-thick sensor cover glass as found on a mirrorless camera like the Sony A7R/A7/A7s.

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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.
  • Save money by choosing the right lens for your needs the first time, particularly the Summilux/Summicron/Elmarit choice and/or Zeiss ZM.
  • Make better images, a sort of “cheat sheet” saving yourself months or years of ad-hoc learning. Processing parameters are discussed and shown.
  • Jaw-dropping image quality found nowhere else utilizing Retina-grade images up to full camera resolution, plus large crops [past 2 years or so].
  • Real world examples with insights found nowhere else. Make sharper images just by understanding lens behavior you won’t read about elsewhere.
  • 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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Variants Design spec 0.8mm cover glass, Mirrorless 2.5mm cover glass available in full article

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