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Neutral, Rear Defocus, Front Defocus from f/2 through f/11 (Bird of Paradise)
This close-range aperture series compares the effects with the Nikon 105mm f/2 DC at its zeroed position and at the F (foreground) and R (rear) positions marked 5.6. The bokeh effects are bracketed by using these settings
Bird of Paradise
Adobe Camera Raw 10.4.0.976: view ACR settings. Camera Profile=Adobe Color.
By f/5.6 there is little difference in background bokeh. However, sharpness on the subject is much superior with the lens zeroed (defocus control unused). This is true also at f/4, though to a lesser extent. It is fair to say that only at f/2 and f/2.8 are the effects obvious. which does not mean that f/4 and f/5.6 might be subtly different which they are: when set to R/5.6, the focus shift is strong enough that the focus lands on the orange petals, leaving the green capsule just slightly soft. For best results in terms of focus landing where desired with stopping down (focus shift), leave the lens zeroed.
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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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