This page shows results and examples from 135mm lenses.
The amount of focus shift varies by lens. These examples were shot at a distance of approximately 84 inches (2.1 meters).
The lens was focused at f/2. Focus shift is absent.
Worth noting is the unappealing but mild color bokeh in the foreground and background (magenta/green fringes). This is due to uncorrected (non apochromatic) color aberration and is very common with fast lenses. It mostly disappears by f/4.
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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.
Focused at f/2: mouse over for f/4 (actual pixels)