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Zeiss Loxia Ergonomics / Haptics

Having shot the Zeiss ZM 35mm f/2 Biogon and many of its siblings over ~5 years, your author has developed a sense of how that classic design handles in the field. This page compares and contrasts the ZM 35/2 Biogon operation to the Loxia 35/2 Biogon; the same ideas apply to the ZM 50/2 Planar and Loxia 50/2 Planar pairing.

The Loxia lenses are identical in optical design to their ZM counterparts, but modified slightly to account for for the relatively thick sensor cover glass on the Sony A7 series cameras (E mount). Field comparisons show that unless one is stopping well down, the ZM 35/2 Biogon and even the ZM 50/2 Planar are not up to the performance of the tweaked Loxia models (the ZM designs are/were for film originally, and suffer from ray angle issues from the thick sensor cover glass).

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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.

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  • 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.
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  • 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.

Two well used Zeiss lenses after extensive field use
Zeiss Loxia 35mm f/2 Biogon and Zeiss ZM 35mm f/2 Biogon

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