EXCERPT page containing first few paragraphs. 2022-10-05 15:22:34
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Shot using Sony A7R IV Camera1 using lens Sample1 of the 12-24/2.8GM.
Includes images from f/2.8 through f/11 at up to full camera resolution, plus crops.
Zone of focus
The most difficult technical challenge in comparing lenses is matching the zone of focus (NOT just having them both sharp at some point). This is so hard to do that it’s just about impossible to get right in the field—even comparing the lens to itself. And it’s even harder with an f/4 lens, and then when field curvature and focus shift differ (always), then the choice of focus position has a huge influence on the results. Here, there is clearly differing field curvature and it’s just not possible to match the zone of focus over more than a small area.
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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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