EXCERPT page containing first few paragraphs. 2023-03-21 16:11:30
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MTF: Zeiss ZM 21/2.8 Biogon
Performance is very high for a 21mm lens, with center contrast showing exceptional values that declines gracefully to the corners.
The edges and corners at f/5.6 show some astigmatism, so we can expect that detail here might be of somewhat lower crispness, depending on the subject matter. This seems to be the case with some field shots., and it might also depend on distance.
Compare to the Leica 21mm f/3.4 Super-Elmar-M ASPH at f/5.6.
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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.
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- 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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