This pages shows the same image taken at f/2, f/4, f/8, f/16; four frames, with each frame doubling the depth of field of previous frame.
This demonstrates the effects achievable at each aperture, and shows why shooting at f/2, might be your best choice with some subjects, in order to isolate the subject. It also shows how pleasing the 200/2L IS remains when stopped down.
Already at f/4, the subject competes with a distracting background.
Click to view the series for a large screen (1920 or larger).
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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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