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Autofocus and Fine Focus Adjust

The Pentax 645D has a fine focus adjust feature (custom setting #33). It can be used to force focus forward or back of where the camera would otherwise focus.

The fine focus adjustment applies to both autofocus and the focus assist in manual focus mode.

After about 90 minutes of effort, I felt frustrated:

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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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