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Color Cast at Edges (M240, 24/3.8)
Lens correction with wide angle lenses is needed to compensate for the steep ray angle to the sensor, which result in color casts moving away from the cent of the frame (see the Zeiss 21mm f/4.5 Biogon examples for a worst-case scenario). This issue is inherent to the Leica M lenses on digital sensors.
Both the Leica M9 and the Leica M Typ 240 have such correction built-in for all Leica M coded lenses. Other brands can “pretend” to be Leica M lenses via the Coder Kit, and this can work well in some cases.
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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.
M240 missing info (left)
M9P has info (right)