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Leica 50mm ƒ/2 APO-Summicron-M ASPH

Skewed Plane of Focus

June 2013 lens sample, which suffered from poor flare control.

With a variety of shots, I had noticed an odd plane of sharpness that appeared to cut from the distance at left towards the foreground at right.

Seeing this with only one or two images, I chalked it up to a visual misunderstanding of subject distance, albeit with an uneasy feeling. But too many images cropped up with this effect to dismiss. Of course, aperture ƒ/2 shows it most clearly, so that many images made stopped down mask the effect also.

Ancient bristlecones

Where it is sharp, the sharpness is really impressive!

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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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ƒ/2 @ 1/1500 sec handheld, ISO 200
Leica M240 + 50/2 APO-Summicron-M ASPH
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