EXCERPT page containing first few paragraphs. 2021-10-21 01:13:24
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Field shooting examples showing the performance over a range of conditions.
See the important note on lens symmetry and parallelism. Comments here incorporate by reference this important discussion.
Glacial erratics in Tuolumne River
I deemed depth of field important here, so f/16 was used to ensure that at least the main erratic would be sharp, with adequate sharpness on the leading smaller rocks also.
Between the effects of diffraction and possible movement (still but non-zero wind), one should not be too critical of sharpness, which is very good and consistent across the frame, but not tops.
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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.
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- Workflow discusses image organization, raw conversion and post processing. Many examples show processing parameters for direct insight into how the image was converted.
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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.