EXCERPT page containing first few paragraphs. 2021-11-29 13:00:45
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Lenses designed for film never had to worry about the angle of incidence to the sensor, the “ray angle” from the lens exit pupil.
On a digital sensor, the ray angle causes:
- Vignetting of both brightness (luminance) and color.
- Image degradation off-center from the sensor cover glass; the thicker the glass, the more degraded image sharpness is, presenting as strong astigmatism.
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Diglloyd Guide to Mirrorless offers comprehensive integrated coverage of most APS-C and full frame mirrorless cameras and lenses.
Special emphasis is placed on Sony full-frame, including Sony lenses and the high performance Zeiss Batis and Zeiss Loxia lenses plus Rokinon/Samyang and others. Fujifilm X, Olympus and Panasonic M4/3, Sigma dp Merrill and dp/sd Quattro are also covered in depth. Years in the making, it offers a wealth of material for choosing and using a mirrorless camera.
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- 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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