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Conclusions

Please review the individual conclusions for each of the tests.

Picking a winner

In picking a winner, the cost of the lens should not be considered, because each photographer has a different budget and different needs.  One photographer may require satisfactory performance at low cost, while another may need top-flight performance at any reasonable cost.   A lens review which includes cost as a consideration corrupts its conclusions by becoming subjective instead of objective.  Disentangling the objective data from the subjective assessment of cost may be problematic.  Such an approach is of little value to the photographer who can think.

Even an objective review suffers from some subjectivity, because certain decisions need to be made about the relative importance of lens characteristics. But at least this kind of subjectivity is based on objective data, and can be related to actual needs.   diglloyd has made the following assumptions in picking a winner:

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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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