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Leica M Monochrom Typ 246

Leica M Monochrom Typ 246 as an Infrared Camera

Leica M cameras (M9, M9P, M240) have always had some infrared leakage (the Leica M8 has severe leakage), which is why my gray North Face Recon daypack renders as magenta with those cameras.

The Leica M Monochrom Typ 246 also has significant infrared leakage. This is both good and bad: good, because the MM246 can be used as an infrared camera and bad because infrared degrades image quality subtly (differential focus even with APO lenses).

There is no precise definition of infrared, but somewhere around 680nm is considered to be about where infrared starts (very deep red is around 630 nm). The human eye can see out to about 850nm (using an infrared LED this can be seen to be true), but this is so only in very dark conditions with a bright LED. See diglloyd Guide to Digital Infrared.

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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, Leica SL and Leica S.

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 28 megapixels filling up to 5K display, 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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