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46-megapixel Canon EOS R5
Canon RF 15-35mm f/2.8L IS USM

Aperture Series @ 16mm: Lundy Beaver Pond and High Peaks at Dusk

A lens can deliver credible results on a 3D scene as in Big Laurel at Bend in Alpine Creek. But apply it to a distance scene where everything must be sharp across the frame, and all its dirty laundry is revealed. Few lenses can capture a scene like this without revealing at least one significant weakness.

This series from f/2.8 to f/5.6 reveals a problematic weaknesses in the sharpness across the field of the Canon RF 15-35mm f/2.8L IS USM at 16mm.

These results confirmed identical at closer range in Grey Mud Oozes from Cliff.

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Diglloyd Guide to Mirrorless is by yearly subscription. Subscribe now for about 25 cents a day ($90/year).
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Diglloyd Guide to Mirrorless offers comprehensive integrated coverage of most APS-C and full frame mirrorless cameras and lenses.

Special emphasis is placed on Sony full-frame, including Sony lenses and the high performance Zeiss Batis and Zeiss Loxia lenses plus Rokinon/Samyang and others. Fujifilm X, Olympus and Panasonic M4/3, Sigma dp Merrill and dp/sd Quattro are also covered in depth. Years in the making, it offers a wealth of material for choosing and using a mirrorless camera.

  • Make better images by learning how to get the best results right away. For example, the best way to set up your Sony camera.
  • Save money by choosing the right lens for your needs the first time, particularly with the numerous lenses available for Sony.
  • Make better images, a sort of “cheat sheet” saving yourself months or years of ad-hoc learning—best practices and how-to and processing parameters are discussed and shown.
  • Jaw-dropping image quality found nowhere else utilizing Retina-grade images up to full camera resolution, plus large crops.
  • 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 Sony.

Aperture series 2.8,4,5.6 available in full article

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