EXCERPT page containing first few paragraphs. 2023-02-08 03:04:50
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Distortion (wave type from barrel to pincushion) is very low for a 21mm lens.
The ~1.3% distortion can be visible with an even edge-to-edge horizon or human-made structure, but you’ll be hard-pressed to find a relatively fast aperture 21mm lens with less distortion that performs nearly so well as the 21/3.4.
See also the comparison with the 16/18/21mm f/4 Tri-Elmar-M ASPH.
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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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