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Crops at 35mm — Focus
Focus
This is where the lens was focused.
- At f/1.4, the Nikon 35/1.4 produces a sharp but low contrast image, probably due to spherical aberration. At f/2, it jumps up very nicely in contrast.
- At f/2.8, the 35/1.4 is looking very crisp. The 17-35 is sharp but with very low contrast. The 24-70 is sharp, but with slightly low contrast. The 28-70 is sharp, with contrast better than the 17-35, but not as good as the 24-70.
- At f/4, all the lenses except the 17-35 are showing crisp results, but still a touch low in contrast.
- At f/5.6, all the lenses are very crisp and contrasty, this is their peak. Except for the 17-35, which still shows a low contrast dull image.
- At f/8, performance is maintained, and the 17-35 finally pops up in contrat to match the other lenses.
- Nothing to be gained at f/11 (except depth of field).
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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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