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EXCERPT page containing first few paragraphs. 2021-12-01 05:15:20

50-megapixel Canon 5DS R
Canon EF 85mm f/1.4L IS USM

Examples: Saddlebag Lake Area

These examples show off general imaging performance of the Canon EF 85mm f/1.4L IS US.

Mt Dana, early morning

Mt Dana is a popular non-technical climb via the normal route; park near the Tioga Pass east entrance station just outside the park. An excellent trail heads out at 90° to the road from the entrance station.

I exposed this image for full detail in the snow, but I was not successful in getting Adobe Camera Raw to preserve the detail even with highlights at -100 and shadows at -100 without also making the image too dark. Adobe really does a poor job of offering facilities to deal with HDR images.

The Canon 85/1.4L IS is very sharp wide open in central areas, but high contrast edges (the snow patches are all fringed with magenta, confirming that are limits to the correction for longitudinal chromatic aberration present, not surprising since significant secondary longitudinal chromatic aberration exists and the two are closely related. Stop down to f/2 and the fringing seen here should clear up.

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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.

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f1.4 @ 1/8000 sec handheld, ISO 100; 2018-06-26 06:45:08
Canon EOS 5DS R + Canon EF 85mm f/1.4L IS

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