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Aperture Series with Canon 85mm f/1.2L II (Roof)

This series is intended to explore sharpness and field curvature (if any) with the 85mm f/1.2L II.


Apertures are f/1.2, f/1.4, f/1.6, f/1.8, f/2, f/2.2, f/2.5, f/2.8, ..., f/11. Exposure started at 1/8000 second at f/1.2 through f/2 (adjusted in processing). After that, exposures were increased (compensated) in post processing, because the non-linear exposure seen in the mosaic comparison occurs here also.

Entire frame

This series shows the field illumination characteristics, which even with some adjustment, are uneven. Whether this is the lens or camera is unclear. At around f/2.8, 1/3 stop is lost; the image becomes darker. As shown here, the f/2.8 and smaller apertures were given +1/3 compensation, and even so they are still darker than f/2.

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diglloyd Advanced Photography includes hundreds of pages of exclusive coverage and high resolution, Retina-grade example pictures detailing Canon and Nikon DSLR bodies and their lenses, with in-depth analysis of sharpness and contrast, color, bokeh, vignetting, distortion, MTF, and flare. Also included is a wealth of in-context technique and workflow insight. Since 2006, diglloyd Advanced Photography is the authoritative review and on-line reference for discerning Canon and Nikon shooters. Subscriptions cost $ per year.

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Aperture series 1.2, 1.4, 1.6, 2, 2.2, 2.5, 2.8, 4, 5.6, 8, 11 available in full article
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