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Crops at 28mm — Focus
Focus
This is where the lens was focused.
The 24-70 maintains very high performance from wide open on down to the bounding effects of diffraction.. The 16-35 and 28-70 are almost as good starting at f/4.
- At f/2.8, the 24-70 is a standout, showing crisp detail with outstanding contrast. The 17-35 shows ultra low contrast (haze), whereas the 28/2 and 28-70 show a very good, but low contrast image.
- At f/4, the 24-70 maintains its outstanding crispness. The 16-35 is excellent, but not as contrasty as the 24-70. The 17-35 is still hazy, th 28-70 is very similar to the 16-35, and and the 28/2 is very close to both.
- At f/5.6, the story is similar to f/4, with the 24-70, 16-35 and 28-70 all looking excellent. Tthe 17-35 crisps up, but its contrast is still slightly low. The 28/2 is now looking nearly as good as the better zooms.
- At f/8, all the lenses are very similar.
- Aperture f/11 dulls the brilliance of all the lenses just a bit.
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Diglloyd DAP is DSLR-oriented, but also contains workflow and other topics. Much of the focus is on Canon and Nikon but also Pentax and Pentax medium format.
Special emphasis is placed on lens evaluation, focusing on Canon and Nikon and Sigma lenses, but with a few others like Rokinon/Samyang.
- Make better images by learning how to get the best results right away.
- Save money by choosing the right lens for your needs the first time, particularly some of the new Sigma Art lenses vs Nikon and Canon.
- Workflow discusses image organization, raw conversion and post processing. Many examples show processing parameters for direct insight into how the image was converted.
- Jaw-dropping image quality found nowhere else utilizing Retina-grade images up to full camera resolution, plus large crops [past 2 years or so].
- 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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