EXCERPT page containing first few paragraphs. 2023-12-02 01:05:06
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Compared: Noctilux, Summilux, APO-Summicron (M240, Green Paint Bldg)
June 2013 50/2 APO, which suffered from poor flare control.
Two prior comparisons showed a deeply 3D scene (bristlecone) and an interior semi-planar scene (lounge chair)
What if one really does want to shoot an almost entirely planar subject, like a building or a mural or a distance landscape scene?
A lens that delivers predictable flat field performance offers much more satisfaction for such scenes; it is “predictable” and can be shot at a wider aperture without concern for sharpness variations.
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Diglloyd Guide to Leica is by yearly subscription. Subscribe now for about 25 cents a day ($90/year).
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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.

f/0.95 Noctilux-M ASPH
f/1.4 Summilux-M ASPH
f/2 APO-Summicron-M ASPH
(to scale)