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EXCERPT page containing first few paragraphs. 2023-03-29 05:42:47

Lens Correction Examples (mostly for Zeiss)

This page has been largely superceded by the Color Shading for M-Mount lenses on Leica M9. However, there are a few lenses on this page not present on the newer page.

See discussion on the previous page.

What follows are examples of various lenses without and with Lens Detection, as noted. Lighting was fairly uniform but not guaranteed perfect, so don’t read anything into minor variations, look at the overall result.

Within Photoshop, a Gaussian Blur was used to smooth out the images, eliminate dust spots, etc. All lenses were shot at f/8, and RAW processing set the center of the image to neutral gray of {200,200,200} in ProPhotoRGB 16-bit, adding exposure compensation as need to match within 1 RGB value. Images were all converted to 8-bit sRGB JPEGs for display here.

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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.

Zeiss ZM 18/4 Biogon @ f/8
lens correction = off

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