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Focus accuracy

In most usage I found focus to be accurate.

However, I observed focus error under low-light conditions, and even under some conditions where it should not have been an issue. Below, the goose should be in focus, but it is obvious that the lens focused about 18" (1/2 meter) in front of the goose. I had placed the focusing spot right on the body of the goose.

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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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front focus
front focus error
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