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Nikon D810

Tamron 15-30mm f/2.8

Image Stabilization on Tripod Destroys Sharpness (Nikon D810, Dark Rocks)

The Tamron SP 15-30mm f/2.8 Di VC USD offers image stabilization via a small switch on the lens. Used on a tripod, the results can be disastrous, as this series shows. The damage can be severe, or subtle; it appears to be related to shutter speed.

But for starters, why would any camera attempt to stabilize the image at 4 second and longer exposures? Or even one second? Is there a real world case in which it even makes sense and in which the camera could guarantee better results? It makes no sense unless the stabilization is extremely precise and accurate, and also free of hysteresis.

Perhaps a camera like the Nikon D810 perhaps ought to have a setting that says “disable image stabilization at speeds slower than X”, where “X” ought to default to 1 second, or perhaps even 1/8 of a second. But there is no such feature. And with tripod use, faster speeds are still subject to issues, so it’s up to the user to disable IS when using a tripod.

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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 2.8,4,5.6,9,13 available in full article

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