EXCERPT page containing first few paragraphs. 2022-01-25 12:40:15
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With the debut of the Canon EOS R system, Canon continues to publish the same inadequate 10 and 30 lp/mm MTF charts it has for years, and for only one aperture (wide open) and without specifying spectral balance or focusing distance (presumably infinity). Net/net the MTF chart offers limited insight versus charts from Zeiss with white light made measured from actual lenses. Still, the chart is suggestive of performance at 40 lp/mm and beyond.
The MTF chart for the Canon RF 28-70mm f/2L shows outstanding performance wide open at f/2—and this is a zoom! It can’t get much better in the central 3/4 of the frame, and presumably stopping down to f/2.8 will bump the corners up top notch performance.
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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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