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Canon 24-70mm f/2.8L

Outstanding sharpness in infrared, but under some conditions hot spots become noticeable by f/8, or even f/5.6.

Canon EF 24-70 f/2.8L hot spots

Though I’ve achieved pleasing results with this lens (see Sept 4, 2006 blog entry), caution must be exercise when stopping down beyond f/4 at the wide end, and f/5.6 at the long end.

70mm

Canon 24-70 f/2.8L Backfocus

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Diglloyd Infrared Photography covers cameras and lenses for infrared photography.

The coverage explains all the issues involved in shooting in infrared, which do not change. It is not a review of any particular camera or lens, though many examples are included.

  • Guidance on workflow for infrared, including black and white and channel swapping for false-color images.
  • How infrared renders, and why certain spectral cutoffs matter: false color vs black and white.
  • Image quality issues to be on the lookout for in infrared.
  • Numerous lens evaluations in infrared.

View an overview of infrared as well as filter spectral transmission plus examples from an optimal lens.

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