EXCERPT page containing first few paragraphs. 2020-09-22 13:07:19
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Field testing showed that focus-matching to an accuracy that ensures a defensible test is quite difficult, even with multiple attempts (tried).
Hence this comparison used focus bracketing with a nodal slider to ensure the absolute best results from each lens (series shots, adjustments made for the best results), ruling out any doubt of a “best possible” for each lens. It is thus definitive for close range, and field shots with the 17/1.8 suggest that the results apply to medium distance as well.
The nodal slider (by adjusting distance) also neutralized the very substantial difference in entrance pupil offset so that the 14-35mm f/2 ED was actually shot at 17mm, not the wider zoom setting that would have otherwise been required.
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Diglloyd Guide to Mirrorless offers comprehensive integrated coverage of most APS-C and full frame mirrorless cameras and lenses.
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