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MTF Curves

Please refer to Making Sharp Images for discussion and examples of how to read MTF charts, as well as the very real issues of build quality and testing for a bad lens or camera.

The presence of mild astigmatism suggests a trace of lateral chromatic aberration might be present, and this indeed is the case in field shooting. Field curvature might also be present, and the modest performance outside the central 2/3 area (15mm offset) suggest that this lens would best be used on a DX format sensor.

Nikon doesn’t publish MTF other than wide-open, but field shots show a marked improvement at f/5.6, so f/4 should be avoided on full-frame cameras; stop down to f/5.6 if feasible.

Remember that a real physical lens can only approach its as-designed specifications, and might not meet this ostensible performance level due to build variation/errors.

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Since 2006, Diglloyd Advanced Photography is the authoritative review and reference for DSLRs and their lenses: Canon and Nikon primarily, but also Pentax and some medium format. Reviews of key DSLRs are included, but the primary focus is on lens performance. Also included is a wealth of technique and workflow approaches.

DAP includes thousands of pages of exclusive coverage and high resolution Retina-grade examples detailing Canon and Nikon DSLR bodies and their lenses, with in-depth analysis of sharpness and contrast, color, bokeh, vignetting, distortion, MTF, and flare, behavioral and practical usage.

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MTF for Nikon AF-S Nikkor 16-35mm f/4G ED VR     
MTF for 24-120mm f/4G ED VR at 24mm
     MTF for Nikon AF-S Nikkor 16-35mm f/4G ED VR
MTF for 24-120mm f/4G ED VR at 120mm

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