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Sony A7R
Leica 21mm f/3.4 Super-Elmar-M ASPH

Aperture Series: Pescadero Creek (Sony A7R)

The Sony A7R is a 36-megapixel mirrorless camera with a full-frame sensor incorporating micro lenses, which might be hoped to allay the ray angle issues that lead to color shading and excessive vignetting and loss of off-center sharpness.

This scene was chose to show definitively whether the 21/3.4 Super-Elmar-M performance is impaired on the Sony A7R sensor. The Novoflex Leica M to Sony NEX lens adapter was used.

Examination of the lens shows only a modest telecentricity, so the predicted behavior is that there will be significant impairment of image quality outside the central 1/2 of the frame.

Didactic documentation

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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 3.4, 4, 5.6, 8, 11, 16 available in full article

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