EXCERPT page containing first few paragraphs. 2023-12-06 15:58:55
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This eight-image series shows how the veiling flare behavior of the Leica 90mm f/2.4 Summarit-M depends on small changes in the way non-image-forming light enters the lens and how flare can suddenly flare up (!) with only a small change in angle to a light source.
The camera was rotated and this series of eight images was taken at f/8 with the supplied lens hood mounted. Exposure was identical for all frames, so the flare as shown is purely the result of the flare characteristics of the lens.
Observe that the same light source as image forming light (frames #1 and #2) is much less of a problem than when that same light source is just outside the frame (#4).
The serious problem is that even a bright sky causes strong veiling flare, as shown in the Mining Camp Bunkhouse example (the 90/2.4 behaves the same way). It really is unacceptable in such an expensive optic, but regrettably this type of behavior plagues most all Leica M designs.
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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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