EXCERPT page containing first few paragraphs. 2021-01-20 23:15:13
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This series from f/1.4 through f/16 examines total imaging performance of the Leica 28mm f/1.4 Summilux-M ASPH. Sharpness near-to-far and across-the-field along with field curvature, focus shift and general imaging performance. As well, how well f/16 holds up (not so well) versus f/11.
Includes images from f/1.4 through f/16 at up to full resolution, plus crops.
Aperture f/11 is subject to moderate diffraction dulling for fine detail, and f/16 much more so. Regrettably, the 28/1.4 breaks down very badly at f/16, at least with a red filter. It’s not just about diffraction, but could be also about internal lens flare from collimated rays. However, red light suffers from diffraction much earlier than blue or green light, so the dropoff might be wavelength related.
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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.
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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