exposure
Let an agent explain photographic exposure by settings, metering and correction, and separate radiation, weather and other senses.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain photographic exposure by settings, metering and correction, and separate radiation, weather and other senses.
In photography and imaging, the amount of light per unit area reaching a film or sensor during capture, controlled by aperture and shutter speed and interpreted with sensitivity (ISO), and summarised by exposure value; overexposure and underexposure are too much or too little light. Radiation exposure and exposure to cold are different senses.
What it is for: Photography, cinematography and imaging.
It can be set exposure with aperture, shutter and ISO; read histograms and meters; fix over- and underexposure; separate other senses of exposure.
Distinguishing features
Light per area during capture
Set by aperture and shutter
Measured in exposure values
Affects brightness and detail
What it looks like
Brightness of an image; shown in histograms and exposure meters.
How it is recognised
f-numbers, shutter speeds and ISO
Histograms and exposure compensation
Contrast is a different property
Related models
is a kind of - category
is controlled by - settings
is measured by - instrument
is used in - device
In practice
Families and kinds
correct exposure
overexposure
underexposure
long exposure
multiple exposure
Standards and regulation
ISO 12232 sensitivity standards
ISO 2720 exposure meter standards
Failure modes and hazards
Clipped highlights and lost detail
Confusing ISO with exposure
Eye damage when photographing the sun
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.exposure-act
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Settings Exposure triangle.
Settings interact.
Triangle
Aperture, shutter, ISO.
Triangle
Exposure triangle.
- Which aperture, shutter speed and ISO give correct exposure here? measurement
- What are the side effects on depth of field and motion? definition
EV
Exposure value.
EV
Exposure value.
- What exposure value suits this scene? measurement
- How does exposure compensation change it? definition
Metering Measuring light.
Meters guide exposure.
Meter
Metering modes.
Meter
Metering.
- Which metering mode suits this scene? action
- Why can bright or dark scenes fool the meter? definition
Histogram
Reading histograms.
Histogram
Histograms.
- What does the histogram show about exposure? definition
- Are highlights clipped? boundary
Correction Fixing exposure.
Some errors can be fixed.
Edit
Post-processing.
Edit
Editing.
- How much can exposure be corrected in editing, especially from RAW files? definition
- What detail is lost? boundary
Special
Long and multiple exposures.
Special
Special techniques.
- How can long or multiple exposures be made safely and legally? action
- Which filters help? provenance
Senses Disambiguation.
Exposure has other senses.
Radiation
Radiation exposure.
Radiation
Radiation sense.
- Is radiation exposure meant? boundary
- Which entry fits? action
Weather
Exposure to cold.
Weather
Weather sense.
- Is exposure to cold or weather meant, and is someone at risk of hypothermia? boundary
- Should emergency services be contacted? action
What the second pass must settle
- Should exposure techniques be separate entries?
- How should the radiation sense be split off?
- How should EV tables be linked?