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EXCERPT page containing first few paragraphs. 2022-01-22 18:23:11

Zeiss Touit 12mm f/2.8 Distagon

Aperture Series: Sharpness and Bokeh (Picnic Table, NEX-7)

This aperture series shows the sharpness and bokeh characteristics of the Touit 12mm f/2.8 Distagon using the 24-megapixel Sony NEX-7.

The camera was angled steeply down and almost on top of the picnic table, with focus on the metal bolts about 1/3 in. The camera is close to centered, but not necessarily square to the table, hence the lower corners can vary in sharpness (by camera/subject angle): there is a slight skew to the angle to the table. [The table is warped and along with some lens distortion it is very hard to judge alignment).


The Sony NEX-7 was erratic in its exposure consistency (aperture priority), choosing shutter speeds that varied by 1/3 stop across apertures, and with unexplained variations in exposure. There were no clouds obscuring the sun.

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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.
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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.

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Aperture series 2.8, 4, 5.6, 8, 11 available in full article

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