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Leica 28mm f/2 Summicron-M ASPH (2016)

Distortion

Distortion is low for a 28mm f/2 lens, but shows up on buildings or even horizons. Yet few 28mm lenses have distortion this low, excepting its exceptional 28/2.8 sibling.

The distortion is not strictly uniform barrel distortion; it “flattens” slightly at about 2/3 from center. This could make it more difficult to correct in software, but it is probably close enough.

The 1.2% distortion is very low for an f/2 lens, and on most subjects it will not be detected by the eye— except for architecture, see the examples with its 28/2 predecessor, which performs identically.

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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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Leica 28mm f/2 Summicron-M ASPH (2016) distortion

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