EXCERPT page containing first few paragraphs. 2023-12-02 01:20:06
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Aperture Series: Lincoln Electric Clock Lamp
This series from f/4 - f/11 looks at relatively close range sharpness and bokeh.
Lincoln Electric Clock Lamp
Adobe Camera Raw 9.6 (625): ACR settings, Camera Profile = Embedded. No lens corrections.
Diffraction-mitigating sharpening was used for the f/8 (minimal setting) and f/11 frames as per Mitigating Micro Contrast Losses from Diffraction Blur in Making Sharp Images.
Pincushion distortion might be a mild factor here (straight boards which may not actually be straight), but it is hard to tell and at low levels. Mild vignetting at f/4 is mostly gone at f/5.6 and improves a bit more in outer zones at f/8.
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