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Nikon 85mm f/1.4G

Focus Shift and Color Bokeh

This page assesses focus shift and color bokeh at a distance of approximately 2 meters.

Focus shift

Sharpest focus at f/1.4 appears to be about at the 10.5 mark; keep that in mind when examining the zone of sharpness at various apertures.

Stopping down offers just enough increased depth of field to maintain sharpness at the point of focus, barely. Observe that the “11” mark is still not sharp at f/5.6, because the zone of sharpest focus has moved rearward.

This amount of focus shift is significant, and problematic on the 36-megapixel Nikon D800 / D800E; see the close-range dolls comparison.

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Diglloyd DAP is DSLR-oriented, but also contains workflow and other topics. Much of the focus is on Canon and Nikon but also Pentax and Pentax medium format.

Special emphasis is placed on lens evaluation, focusing on Canon and Nikon and Sigma lenses, but with a few others like Rokinon/Samyang.

  • Make better images by learning how to get the best results right away.
  • Save money by choosing the right lens for your needs the first time, particularly some of the new Sigma Art lenses vs Nikon and Canon.
  • Workflow discusses image organization, raw conversion and post processing. Many examples show processing parameters for direct insight into how the image was converted.
  • Jaw-dropping image quality found nowhere else utilizing Retina-grade images up to full camera resolution, plus large crops [past 2 years or so].
  • Real world examples with insights found nowhere else. Make sharper images just by understanding lens behavior you won’t read about elsewhere.
  • Aperture series from wide open through stopped down, showing the full range of lens performance and bokeh.
  • Optical quality analysis of field curvature, focus shift, sharpness, flare, distortion, and performance in the field.

Want a preview? Click on any page below to see an excerpt as well as extensive blog coverage, for example on Nikon or on Canon or on Pentax.

Aperture series 1.4, 2, 2.8, 4, 5.6, 8, 11 available in full article

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