EXCERPT page containing first few paragraphs. 2021-12-05 16:30:06
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These examples look at the correction for longitudinal chromatic aberration (violet/purple fringing) and secondary longitudinal chromatic aberration using real world images in real world lighting chosen to challenge the lens.
The blue end of the spectrum (blue/violet/near UV) is the hardest part of the spectrum to correct. Perhaps it is one reason that many if not most cameras have a violet cutoff filter over the sensor. , we cannot be entirely sure of correction for deep violet (approaching UV) because of this cut filter at 420 nm; the human eye can see from about 390nm to 850nm (dimly). What this means is that the color violet cannot even be captured by a Sony camera.
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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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