EXCERPT page containing first few paragraphs. 2021-12-02 20:58:55
UA_SEARCH_BOT_null @ 188.8.131.52
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.
Article continues for subscribers...
Diglloyd Infrared Photography is by yearly subscription. Subscribe now for about 8 cents a day ($30/year).
BEST DEAL: get full access to ALL 8 PUBLICATIONS for only 68 cents a day ($249.95)!
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