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Leica 24mm f/3.8 Elmar-M ASPH

Vignetting: 24mm f/3.8 Elmar-M ASPH

The change in field illumination is entirely done by f/5.6. All that remains is the natural vignetting governed by optical laws for this kind of lens construction.

Even the difference from f/3.8 to f/5.6 and to f/8 is almost inconsequential as a practical matter. Along with superlative performance, the only reason to stop down is to increase depth of field.

See also the Color Shading page.

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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.

Want a preview? Click on any page below to see an excerpt as well as extensive blog coverage, for example on Leica.

Vignetting of the Leica 24mm f/3.8 Elmar-M ASPH
Leica 24mm f/3.8 Elmar-M ASPH vignetting @ f/4 — uncorrected

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