EXCERPT page containing first few paragraphs. 2020-12-01 15:55:40
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This aperture series serves two purposes
First, it demonstrates the sharpness limitations of the Venus Optics for the Laowa 12mm f/2.8 Zero-D.
Second, it shows that zero or near-zero optical distortion coupled with leveling the camera can produce an image in which the only “distortion” is so-called perspective distortion*, which is not distortion at all, but rather the inverse square law of light, gravity, etc.
* Perspective distortion has nothing to do with focal length, being dependent only on the distance of the entrance pupil of the lens to the subject matter. In other words, a 400mm lens and a 15mm lens have exactly the same perspective at the same distance, though obviously the 400mm image would be greatly magnified, hence the confusion about perspective by most photographers.
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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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- 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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