EXCERPT page containing first few paragraphs. 2019-02-23 22:12:08
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This pair of aperture series looks at performance from f/1.2 through f/5.6. My expectation is for at least two things in a 45mm f/1.2 lens for M4/3 (or any format):
- Symmetric sharpness across the field; the lens will almost certainly be sharpest in the central area and less sharp in peripheral areas, but I expect to see similar sharpness in the outer zones on left and right.
- For a high performance lens, peak performance (or very nearly so), 3 stops down, e.g., f/3.2 for the 45/1.2. But performance should be very strong by 2 stops down e.g., f/2.4. If the lens requires f/4 or f/5.6, this is unacceptable.
Includes up to full-resolution images from f/1.2 through f/5.6.
Kolob Canyons Cliffs
Adobe Camera Raw 10.2.0 (894). View ACR settings. Process=Adobe Version 4.
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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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- 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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