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Voigtlander 50mm f/2 APO-Lanthar

Distortion for Voigtlander 50mm f/2 APO-Lanthar Aspherical

Voigtlander does not publish distortion graphs for its lenses AFAIK. This page shows what to expect at infinity focus for distortion and distortion correction.

Distortion is a very slight pincushion distortion (bowing inwards), perhaps 0.5%. It is low enough that there should be no reason to correct it except for images like this having the need for absolutely straight lines.

Since distortion correction damages micro contrast, it is best to not correct it unless required, especially since correcting pincushion distortion damages the central areas the most.

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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.

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