EXCERPT page containing first few paragraphs. 2019-05-23 13:09:42
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Very sharp images in central 2/3 of the frame, with detail becoming smeared near the corners even at f/11. Sample quality varies widely. Hot spots become troublesome by f/8, with shorter focal lengths more problematic.
Canon 16-35 f/2.8L hot spots (original model)
Hot spots are pronounced. Stopping down beyond f/5.6, particularly in difficult lighting, usually produces unacceptable results, though the red and green channels might be usable. Behavior is essentially the same as the 16-35mm f/2.8L II.
Overall, the 16-35mm f/2.8L offers remarkable focus, achieving excellent accuracy without filtration.
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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.
EF 16-35mm f/2.8L II, 21mm @ f/9