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42MP Sony A7R III
Zeiss Batis 40mm f/2 CF
Zeiss Batis 40mm f/2 CF

Aperture Series: Autumn Aspen in Deep Valley

Here the Zeiss Batis 40mm f/2 CF is put to the test from f/2 through f/8.

The extremely demanding series reveals every flaw in a Zeiss Otus or any top-grade lens as I found when also shooting it with several Otii. Exacting focus is required (accomplished) and this shows behaviors like mild field curvature that would be difficult to detect in most scenes. As well, the extremely fine detail in the subject matter reveals just how sharp the lens is from center to corners.

The regrettable fact is that when aspen leaves of a singular color (yellow/orange) are rendered on a Bayer matrix sensor, much potential detail is lost. This would be a fascinating capture on a true-color sensor of similar pixel count, or an ~80 megapixel Bayer matrix sensor so that better color detail could be resolved.

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Diglloyd Guide to Mirrorless is by yearly subscription. Subscribe now for about 25 cents a day ($90/year).
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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 28 megapixels filling up to 5K display, 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 2,2.8,4.5,6.3,8 available in full article
f2 @ 1/500 sec IS=off, ISO 100; 2018-10-26 17:22:56
[location “Bishop Creek”, altitude 8600 ft / 2621 m, 45°F / 7°C, LACA correction]
Sony A7R III + Zeiss Batis 40mm f/2 CF

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