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EXCERPT page containing first few paragraphs. 2019-09-18 01:04:33
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Olympus OM-D E-M1

Olympus E-M1 Backfocus with 12-40mm f/2.8 PRO

Out in the field, your author made it a point to make a variety of comparisons and aperture series with the 12-40mm f/2.8 PRO zoom (and other lenses).

Sometimes the EM1 delivered pinpoint autofocus, e.g. with very high contrast sunlit targets), and at other times there was severe backfocus, or in other cases, front-focus error.

The results with the 12-40mm and 12-35mm SHG zooms were dismal: frequent and substantial autofocus errors rendering much hard work useless to the goal (comparisons and aperture series). Yet manual focus has its own trickiness, with f/2.8 on MFT having the depth of field of f/5.6 on full frame—not a lot to go on to distinguish nuances.

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Diglloyd Guide to Mirrorless offers comprehensive integrated coverage of most APS-C and full frame mirrorless cameras and lenses.

Special emphasis is placed on Sony full-frame, including Sony lenses and the high performance Zeiss Batis and Zeiss Loxia lenses plus Rokinon/Samyang and others. Fujifilm X, Olympus and Panasonic M4/3, Sigma dp Merrill and dp/sd Quattro are also covered in depth. Years in the making, it offers a wealth of material for choosing and using a mirrorless camera.

  • Make better images by learning how to get the best results right away. For example, the best way to set up your Sony camera.
  • Save money by choosing the right lens for your needs the first time, particularly with the numerous lenses available for Sony.
  • Make better images, a sort of “cheat sheet” saving yourself months or years of ad-hoc learning—best practices and how-to and processing parameters are discussed and shown.
  • Jaw-dropping image quality found nowhere else utilizing Retina-grade images up to full camera resolution, plus large crops.
  • 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 Sony.

Aperture series 2.8, 4, 5.6, 8 available in full article

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