EXCERPT page containing first few paragraphs. 2019-04-24 04:13:16
UA_SEARCH_BOT_null @ 18.104.22.168
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.
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.