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EXCERPT page containing first few paragraphs. 2019-04-19 14:16:34
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Image Stabilization

For handheld shooting, image stabilization is a godsend.

John H writes:

It is perhaps a good idea to advise your readers to turn off optical stabilization on the Sigma 180/2.8 when using it on a tripod. I found that when mounted, OS seriously degrades image quality. Easily forgotten.

My experience with Canon and Nikon and Sigma lenses is all the same: Nikon’s vibration reduction (VR), Canon’s Image Stabilization (IS) both can blur images if enabled on a tripod.

The foregoing is not a strict rule; certain unstable tripod setups (spongy ground) might benefit if/when pressing the shutter release manually (without a delay or release).

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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.

Sigma 150mm f/2.8 APO-Macro DG HSM and Sigma 180mm f/2.8 APO-Macro DG HSM

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