EXCERPT page containing first few paragraphs. 2021-09-20 19:41:40
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Voigtlander does not publish vignetting graphs for its lenses AFAIK. This page shows what to expect for vignetting at infinity focus.
For the series below, a translucent Nikon white lens cap was taped over the lens hood, then a white garage door was shot at close range with focus at infinity. There might be probably better diffusers, but this method is quite good and far superior to shooting a cloudy sky.
Checking the color in the corners in Lab mode in Photoshop, there is a 2-3 point shift to blue in the extreme corners, with no tint change (neutral on the magenta/green axis). This blue shift into the corners is the norm, less so on modern designed-for-mirrorless lenses, but only a few lenses have no shift at all. It is very low in comparison, for example, to the color shift over the entire frame with some f/1.4 lenses from f/1.4 to f/2 which can be 6 or even 8 points; see color balance by aperture.
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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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- 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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