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Leica 90mm f/2.4 Summarit-M

Notes: 90mm f/2.4 (2.5) Leica Summarit-M

The Leica 90mm f/2.4 Summarit-M replaces its predecessor, the 90mm f/2.5 Summarit-M. At about $2100, it is relatively inexpensive for a Leica M lens.

The Leica 75mm f/2.4 Summarit-S at about $2150 has an “industrial design that offers improved optical performance” over its f/2.5 predecessor, though the details are left unspecified and the optical formula is apparently unchanged, yet the lens is specified as being 0.1 stop faster. One might say that the f/2.4 version is a “tweaked” design.

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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 90mm f/2.4 Summarit-M

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