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Sharpening used in Adobe Camera RAW
Typical 'Amount' of 40-60

Sharpening Leica DNG and RAW Images

This discussion applies in general to Leica M, Leica S DNG files, but also any other RAW files such as Sony NEX ARW files.

Unlike film, which is an analog medium with built-in acutance (edge sharpness) enhancment, all digital capture sensors inherently blur edge sharpness by the discrete sampling of the image. For example, a sharply defined black/white edge falling over two photosites is rendered as gray on those two photosites— averaged from black or white to gray on both photosites.

To restore the natural acutance with a digital image, some level of sharpening is required. Any presentation of images with no sharpening is an unrealistic representation of sharpness which has not accounted for the sensor characteristics.

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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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