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EXCERPT page containing first few paragraphs. 2023-03-29 07:20:22

Nikon D810
Sigma 12-24mm f/4 DG HSM Art

Aperture Series @ 12mm: Sunlight on the Beaver Pond

This aperture series from f/4 through f/11 shows how well the Sigma 12-24mm f/4 DG HSM Art handles flare into a direct intense light source along with bright clouds and deeply shadowed areas.

The ability to maintain contrast (minimize flare) is critical in such situations so that shadow areas can be opened up with detail, but not haze. It is particularly important with a camera like the Nikon D810 at ISO 64, because the camera has a tremendous dynamic range—the lens has to not limit that dynamic range (the Canon 5DS R would have been in trouble on this image)

Also treated here are field curvature and focus shift. The example is highly instructive and should prove very useful for anyone shooting the Sigma 12-24/4A.

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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.

Aperture series 4,6.3,9,11,11.1 available in full article

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