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Leica M Monochrom Typ 246

Aperture Series to Assess Diffraction and Digital Artifacts (Dolls)

This aperture series assesses diffraction on the 24-megapixel Leica M Monochrom Typ 246 using the Leica 50mm f/2 APO-Summicron-M ASPH, a very high performer.

Past experience with the Leica M Typ 240 (Bayer matrix color sensor) shows that the first hints of diffraction appear at f/8, with 9.5 still holding good quality but showing some dulling. Obvious dulling (loss of micro contrast) is occurring by f/11 and substantial losses are seen at f/16.

The 24-megapixel Leica M Typ 246 can be expected to suffer at least as much from diffraction, and probably a bit more, perhaps 1/2 stop earlier, since its sensor needs no demosaicing and thus has inherently higher spatial resolution.

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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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Aperture series 2,2.8,4,5.6,8,11,16 available in full article

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