The Nikon 28mm f/1.8G has a rearward focus shift, which can be characterized as “substantial”.
For precision work where one desires full sensor resolution from a high-res digital camera, focus shift is a sharpness-robbing problem for high resolution digital.
Focus shift is a confusing topic, and one which interacts with the varied precision of the autofocus system to further confuse the issue.
Focus shift and how to deal with it are discussed in Making Sharp Images. A brief discussion follows the images.
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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.
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