EXCERPT page containing first few paragraphs. 2018-06-23 12:22:38
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This scene tests the Fujifilm GF 23mm f/4 on the most demanding target I know of: a finely detailed geometrically planar subject at distance. Such a scene is unforgiving of focus shift or field curvature or any lens symmetry defects; it mercilessly reveals any lens shortcomings.
ACR enforces lens corrections for chromatic aberration, vignetting, distortion, a requirement set by the GFX.
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These systems are hugely expensive, so make the right choice for your own needs (full frame vs medium format).
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- Optical quality analysis of field curvature, focus shift, sharpness, flare, distortion, and performance in the field.