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Graphic Visualization of Field Curvature
These two examples with Olympus Zuiko 60mm f/2.8 ED using color saturation to shown the transition from a sharp zone to the unsharp zone.
These are approximations which might be of help in understanding where to expect peak sharpness from the Olympus 60mm f/2.8.
f/4 representation
Use of f/4 affords similar latitude to f/5.6, but the transition to less sharp starts a little earlier.
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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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