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Leica 75mm f/2.4 Summarit-M

Distortion: 75mm f/2.4 (2.5) Summarit-M

Distortion is pincushion distortion, typical for medium telephoto lenses, and similar to the 75/2 Summicron-M ASPH.

While this level of distortion is fairly typical, it shows up on level horizons, buildings, etc. Pincushion distortion is generally more objectionable than barrel distortion to the eye, though that bears on one’s own personal reaction.

With the distortion progressing steadily from the mid zones to corners, the distortion is not a sudden inflection, and this helps reduces its appearance to some degree (versus an abrupt onset).

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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.
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  • 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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Leica 75mm f/2.5 Summarit-M distortion
Variants Uncorrected, Corrected available in full article

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