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EXCERPT page containing first few paragraphs. 2021-12-05 16:39:35
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Canon 5D Mark III

Manual Focusing, Live View

Focusing screen

The focusing screen for manual focus is indeed error prone for by-eye accuracy, as some users supposed. I found that by-eye focusing was unreliable for accurate focus. On the plus side, the focus assist (green dot) feature works pretty well for *some* lenses, but doesn’t work at all for non-chipped lenses (e.g. Zeiss ZF.2 or Leica or anything else with a lens adapter). And the green-dot assist cannot be trusted to deliver accurate focus in many cases, even stopped down to f/5.6.

Zoom button

With the Canon 5D Mark II, the buttons under the thumb at upper right could be used to zoom in/out. This was highly efficient, since the left hand need not move and could remain in place to support the camera.

With the 5D Mark III, by default the user is forced to remove and reposition the left hand from supporting the lens and/or camera to seek out and find the zoom button which is buried among other superfluous buttons on the far left. Worse, the user must pull the camera way from the face to look at the rear of the camera , because the button are not easily distinguished by feel.

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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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