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EXCERPT page containing first few paragraphs. 2021-12-05 16:08:59

Canon EF 300mm f/2.8L

Capable of critically sharp images in infrared even wide open, it also has perfect focus accuracy with my 5D-IR, indicating outstanding correction for chromatic aberrations, which apparently includes infrared. In short, it can be shot wide open at f/2.8 and yield outstanding sharpness.

Field use showed that hot spots are a problem by f/11, especially if the lens is not carefully shielded; the lens hood is absolutely mandatory and light must not strike the front element. Still, hot spots can be a real problem in high contrast situations, as seen below. Sometimes this can be dealt with by avoiding the blue channel. See Hot Spots.

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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.

Variants color, gray available in full article
Canon 300mm f/2.8L IS @ f/11

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