EXCERPT page containing first few paragraphs. 2019-05-26 17:18:20
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Lens coatings on the EF 100/2.8L IS perform fairly well in infrared. However, in the f/11 -f/16 range (and wider apertures under some conditions), there is a significant hot spot effect which can be troublesome. When used for false color, the blue channel contributes an unwanted hot spot.
Backfocus is low, and autofocus works well, indicating a lens that is exceptionally well corrected for color aberrations. Sharpness is outstanding, so long as accurate focus is achieved, accounting for the slight 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.
Canon 5D-IR + EF 100/2.8L @ f/11