EXCERPT page containing first few paragraphs. 2023-03-29 10:15:44
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Aperture Series f/1.4...f/11 — Creek
Here we examine lens performance and depth of field from f/1.4 through f/11. Live View was used to establish focus precisely on a rock at the center of the frame because autofocus was way off, as usual.
Please note that many of the crops are unsharp at wider apertures because they are not within the zone of sharp focus (depth of field). So this example is instructive in at least three ways:
- How image quality in the zone of sharp focus improves with stopping down.
- Vignetting behavior.
- How depth of field improves with stopping down, how well defined the image is, and whether the edges and corners are reputable or not.
A full aperture series is shown for each crop (click to view).
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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.
Want a preview? Click on any page below to see an excerpt as well as extensive blog coverage, for example on Nikon or on Canon or on Pentax.