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Monochrome Sensor Capture: Optimal Exposure
Optimal exposure for monochrome capture is the “same” as for color capture: ETTR exposure, that is, the maximum possible exposure without blowing-out highlights. However, there are some special considerations when shooting color for monochrome conversions.
ETTR (Expose To The Right) refers to a histogram which extends all the way to the right side (highlights) without piling up at far right, which would indicate pure white which equates to no detail. See the ETTR section in Making Sharp Images.
In other words, ETTR means an optimal exposure which by its nature minimizes noise and thus maximizes dynamic range. Expose as brightly as possible without blowing-out any important details. This ought to be easy to achieve, but the sorry state of camera histograms makes it harder than it sounds.
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Diglloyd Infrared Photography covers cameras and lenses for infrared photography.
The coverage explains all the issues involved in shooting for monochrome and in infrared. It is not a review of any particular camera or lens, though many examples are included.
- Monochrome vs color cameras.
- Post processing for monochrome.
- 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.
